diff --git a/package-lock.json b/package-lock.json
index e04cd75..8f3bbcd 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -3906,10 +3906,18 @@
       "resolved": "packages/false-memory",
       "link": true
     },
+    "node_modules/@jspsych-timelines/n-back": {
+      "resolved": "packages/n-back",
+      "link": true
+    },
     "node_modules/@jspsych-timelines/spatial-cueing": {
       "resolved": "packages/spatial-cueing",
       "link": true
     },
+    "node_modules/@jspsych-timelines/stroop-task": {
+      "resolved": "packages/stroop-task",
+      "link": true
+    },
     "node_modules/@jspsych/config": {
       "version": "3.0.0",
       "resolved": "https://registry.npmjs.org/@jspsych/config/-/config-3.0.0.tgz",
@@ -15029,6 +15037,46 @@
         "node": ">=0.10.0"
       }
     },
+    "node_modules/postcss-load-config": {
+      "version": "3.1.4",
+      "resolved": "https://registry.npmjs.org/postcss-load-config/-/postcss-load-config-3.1.4.tgz",
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+      "dev": true,
+      "license": "MIT",
+      "dependencies": {
+        "lilconfig": "^2.0.5",
+        "yaml": "^1.10.2"
+      },
+      "engines": {
+        "node": ">= 10"
+      },
+      "funding": {
+        "type": "opencollective",
+        "url": "https://opencollective.com/postcss/"
+      },
+      "peerDependencies": {
+        "postcss": ">=8.0.9",
+        "ts-node": ">=9.0.0"
+      },
+      "peerDependenciesMeta": {
+        "postcss": {
+          "optional": true
+        },
+        "ts-node": {
+          "optional": true
+        }
+      }
+    },
+    "node_modules/postcss-load-config/node_modules/lilconfig": {
+      "version": "2.1.0",
+      "resolved": "https://registry.npmjs.org/lilconfig/-/lilconfig-2.1.0.tgz",
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+      "dev": true,
+      "license": "MIT",
+      "engines": {
+        "node": ">=10"
+      }
+    },
     "node_modules/prettier": {
       "version": "2.8.8",
       "resolved": "https://registry.npmjs.org/prettier/-/prettier-2.8.8.tgz",
@@ -15796,7 +15844,6 @@
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       "dev": true,
-      "peer": true,
       "bin": {
         "rollup": "dist/bin/rollup"
       },
@@ -18878,29 +18925,1113 @@
         "node": ">=14.17"
       }
     },
-    "packages/spatial-cueing": {
-      "name": "@jspsych-timelines/spatial-cueing",
-      "version": "0.2.0",
+    "packages/n-back": {
+      "name": "@jspsych-timelines/n-back",
+      "version": "0.0.1",
       "license": "MIT",
       "devDependencies": {
-        "tsup": "^8.2.4",
-        "typescript": "^5.5.4"
+        "tsup": "^6.7.0",
+        "typescript": "^5.0.2"
       },
       "peerDependencies": {
         "jspsych": "^8.0.1"
       }
     },
-    "packages/spatial-cueing/node_modules/typescript": {
-      "version": "5.5.4",
-      "resolved": "https://registry.npmjs.org/typescript/-/typescript-5.5.4.tgz",
-      "integrity": "sha512-Mtq29sKDAEYP7aljRgtPOpTvOfbwRWlS6dPRzwjdE+C0R4brX/GUyhHSecbHMFLNBLcJIPt9nl9yG5TZ1weH+Q==",
+    "packages/n-back/node_modules/@esbuild/android-arm": {
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+      "resolved": "https://registry.npmjs.org/@esbuild/android-arm/-/android-arm-0.17.19.tgz",
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+      "cpu": [
+        "arm"
+      ],
       "dev": true,
-      "bin": {
-        "tsc": "bin/tsc",
-        "tsserver": "bin/tsserver"
-      },
+      "license": "MIT",
+      "optional": true,
+      "os": [
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+        "node": ">=12"
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+      }
+    },
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+        "sucrase": "^3.20.3",
+        "tree-kill": "^1.2.2"
+      },
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+        "tsup": "dist/cli-default.js",
+        "tsup-node": "dist/cli-node.js"
+      },
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+        "node": ">=14.18"
+      },
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+        "postcss": "^8.4.12",
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+      "license": "BSD-2-Clause"
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+      "dev": true,
+      "license": "MIT",
+      "dependencies": {
+        "lodash.sortby": "^4.7.0",
+        "tr46": "^1.0.1",
+        "webidl-conversions": "^4.0.2"
       }
     },
     "templates/cli": {
diff --git a/packages/n-back/README.md b/packages/n-back/README.md
new file mode 100644
index 0000000..7eb51e7
--- /dev/null
+++ b/packages/n-back/README.md
@@ -0,0 +1,71 @@
+# n-back
+
+## Overview
+
+A timeline for the nback task
+
+## Loading
+
+### In browser
+
+```html
+<script src="https://unpkg.com/@jspsych-timelines/n-back">
+```
+
+### Via NPM
+
+```
+npm install @jspsych-timelines/n-back
+```
+
+```js
+import { createTimeline } from "@jspsych-timelines/n-back"
+```
+
+## Compatibility
+
+`@jspsych-timelines/n-back` requires jsPsych v8.0.0 or later.
+
+## Documentation
+
+### createTimeline
+
+#### jsPsychTimelineNBack.createTimeline(jsPsych, { *options* }) ⇒ <code>timeline</code>
+This timeline describes an N-back task setup that is customizable based on several parameters, allowing researchers to control the level of difficulty, timing, and data output format.
+
+| Parameter           | Type                      | Default       | Description                                                                                   |
+|---------------------|---------------------------|---------------|-----------------------------------------------------------------------------------------------|
+| `stimuli`           | `any`                     |               | Stimuli array used in the N-back task, which can be customized based on the experiment needs. |
+| `keyboard_response` | `string`                  | `"n"`     | Key used by participants to respond during trials.                                            |
+| `trial_duration`    | `number`                  | `1000` ms     | Duration of each trial in milliseconds.                                                       |
+| `post_trial_gap`    | `number`                  | `500` ms      | Gap between trials in milliseconds.                                                           |
+| `fixation_duration` | `number`                  | `500` ms      | Duration of the fixation cross before each trial.                                             |
+| `n`                 | `number`                  | `2`           | Level of N-back, determining how many trials back the participant should remember.            |
+| `num_trials`        | `number`                  | `20`          | Total number of trials in the experiment.                                                     |
+| `rep_ratio`         | `number`                  | `0.2`         | Probability that a stimulus will repeat in the N-back sequence, affecting task difficulty.     |
+| `debrief`           | `boolean`                 | `false`       | Whether to show a debrief screen at the end of the task.                                      |
+| `return_accuracy`   | `boolean`                 | `false`       | Whether to return participant accuracy as part of the output data.                            |
+| `data_output`       | `"none"`, `"json"`, `"csv"` | `"none"`    | Specifies the format for saving output data, if any.                                          |
+
+## Reference for Standard Performance
+
+### Standard N-back Task Performance
+
+The following table summarizes the standard performance (accuracy and reaction times) for control subjects in the 1-back, 2-back, and 3-back tasks, as reported by Harvey et al. (2004).
+
+| Condition | Accuracy (%)      | Reaction Time (ms)         |
+|-----------|-------------------|----------------------------|
+| 1-back    | 96.5 (±3.6)       | 749.3 (±199.0)             |
+| 2-back    | 85.6 (±8.8)       | 1005.5 (±247.2)            |
+| 3-back    | 80.0 (±7.4)       | 1049.5 (±214.8)            |
+
+with a sample size of 22 individuals. 
+
+## Reference
+
+Harvey, P. O., Le Bastard, G., Pochon, J. B., Levy, R., Allilaire, J. F., Dubois, B., & Fossati, P. (2004). Executive functions and updating of the contents of working memory in unipolar depression. Journal of Psychiatric Research, 38(6), 567–576. https://doi.org/10.1016/j.jpsychires.2004.03.003
+
+## Author 
+
+Feng Wan
+
diff --git a/packages/n-back/docs/n-back.md b/packages/n-back/docs/n-back.md
new file mode 100644
index 0000000..3571cca
--- /dev/null
+++ b/packages/n-back/docs/n-back.md
@@ -0,0 +1,51 @@
+# n-back
+
+Building n-back experiment templates in JsPsych
+
+## Parameters
+
+### Initialization Parameters
+
+Initialization parameters can be set when calling `initJsPsych()`
+
+```js
+initJsPsych({
+  timelines: [
+    {type: jsPsychTimelineNBack, params: {...}}
+  ]
+})
+```
+
+Parameter | Type | Default Value | Description
+----------|------|---------------|------------
+          |      |               |
+
+### Trial Parameters
+
+Trial parameters can be set when adding the timeline to a trial object.
+
+```js
+var trial = {
+  type: jsPsych...,
+  timelines: [
+    {type: jsPsychTimelineNBack, params: {...}}
+  ]
+}
+```
+
+Parameter | Type | Default Value | Description
+----------|------|---------------|------------
+          |      |               |
+
+## Data Generated
+
+Name | Type | Value
+-----|------|------
+     |      |
+
+## Functions
+
+If the timeline adds any static functions, list them here.
+
+### function()
+
diff --git a/packages/n-back/examples/index.html b/packages/n-back/examples/index.html
new file mode 100644
index 0000000..08d1116
--- /dev/null
+++ b/packages/n-back/examples/index.html
@@ -0,0 +1,43 @@
+<!DOCTYPE html>
+<html>
+
+<head>
+  <script src="https://unpkg.com/jspsych"></script>
+  <script src="https://unpkg.com/@jspsych/plugin-html-keyboard-response"></script>
+  <script src="../dist/index.global.js"></script>
+  <link rel="stylesheet" href="https://unpkg.com/jspsych/css/jspsych.css">
+</head>
+
+<body></body>
+<script>
+
+  const timeline = [];
+
+  const jsPsych = initJsPsych({
+    on_finish: function() {
+      jsPsych.data.displayData();
+    }
+  });
+
+  const stimuli = ["b", "B", "d", "D", "g", "G", "p", "P", "t", "T", "v", "V"];
+
+  const timeline2Back = jsPsychTimelineNBack.createTimeline(jsPsych, stimuli, "n", 1000, 500, 500, 1, 12, 0.8, data_output = "csv");
+
+  const instructions = {
+    type: jsPsychHtmlKeyboardResponse,
+    stimulus: `
+      <p>Welcome to the N-back task.</p>
+      <p>You will see a sequence of letters on the screen.</p>
+      <p>Press "space" if the current letter matches the one seen "2“ steps before.</p>
+      <p>Press any key to begin.</p>
+    `
+  };
+
+  timeline.push(instructions)
+
+  timeline.push(timeline2Back)
+
+  jsPsych.run(timeline);
+</script>
+
+</html>
\ No newline at end of file
diff --git a/packages/n-back/jest.config.js b/packages/n-back/jest.config.js
new file mode 100644
index 0000000..bd1aace
--- /dev/null
+++ b/packages/n-back/jest.config.js
@@ -0,0 +1 @@
+module.exports = require("@jspsych/config/jest").makePackageConfig(__dirname);
\ No newline at end of file
diff --git a/packages/n-back/package.json b/packages/n-back/package.json
new file mode 100644
index 0000000..198dbed
--- /dev/null
+++ b/packages/n-back/package.json
@@ -0,0 +1,37 @@
+{
+    "name": "@jspsych-timelines/n-back",
+    "version": "0.0.1",
+    "description": "Building n-back experiment templates in JsPsych",
+    "type": "module",
+    "main": "dist/index.mjs",
+    "types": "dist/index.d.ts",
+    "unpkg": "dist/index.browser.min.js",
+    "scripts": {
+      "build": "tsup src/index.ts --format esm,iife --sourcemap --dts --treeshake --clean --global-name jsPsychTimelineNBack"
+    },
+    "repository": {
+      "type": "git",
+      "url": "git+https://github.com/jspsych/jspsych-timelines.git"
+    },
+    "keywords": [
+      "jsPsych"
+    ],
+    "author": {
+      "name": "Feng Wan",
+      "url": "https://github.com/CharlieHFFF"
+    },
+    "license": "MIT",
+    "bugs": {
+      "url": "https://github.com/jspsych/jspsych-timelines/issues"
+    },
+    "homepage": "https://github.com/jspsych/jspsych-timelines/packages/n-back#readme",
+    "peerDependencies": {
+      "jspsych": "^8.0.1"
+    },
+    "dependencies": {
+    },
+    "devDependencies": {
+      "tsup": "^6.7.0",
+      "typescript": "^5.0.2"
+    }
+  }
\ No newline at end of file
diff --git a/packages/n-back/src/index.ts b/packages/n-back/src/index.ts
new file mode 100644
index 0000000..34eadcf
--- /dev/null
+++ b/packages/n-back/src/index.ts
@@ -0,0 +1,109 @@
+import { JsPsych } from "jspsych";
+import jsPsychHtmlKeyboardResponse from '@jspsych/plugin-html-keyboard-response'
+
+export function createTimeline(jsPsych: JsPsych,
+  stimuli: any,
+  keyboard_response: string = "n",          // Default key for response
+  trial_duration: number = 1000,                // Default trial duration in ms
+  post_trial_gap: number = 500,                 // Default gap between trials in ms
+  fixation_duration: number = 500,              // Default fixation duration in ms
+  n: number = 2,                                // Default value for N-back level
+  num_trials: number = 20,                      // Default number of trials
+  rep_ratio: number = 0.2, 
+  debrief: boolean = false, 
+  return_accuracy: boolean = false, 
+  data_output: "none" | "json" | "csv" = "none") {
+
+  const trial_sequence: any[] = [];
+
+  for (var i = 0; i < num_trials; i++) {
+    if (i >= n && Math.random() < rep_ratio) {
+        trial_sequence.push(trial_sequence[i - n]);
+    } else {
+        const possible_stimuli = stimuli.filter(function (s: any) {
+          return (i < n || s !== trial_sequence[i - n]);
+        });
+        const random_stimulus = jsPsych.randomization.sampleWithoutReplacement(possible_stimuli, 1)[0];
+        trial_sequence.push(random_stimulus)
+      }
+    }
+
+  const timeline: any[] = [];
+
+  for (var i = 0; i < trial_sequence.length; i++) {
+
+    timeline.push({
+      type: jsPsychHtmlKeyboardResponse,
+      stimulus: `<p style="font-size: 48px; color: gray;">+</p>`,
+      choices: "NO_KEYS",
+      trial_duration: fixation_duration
+    });
+
+    timeline.push({
+      type: jsPsychHtmlKeyboardResponse,
+      stimulus: `<p style="font-size: 48px;">${trial_sequence[i]}</p>`,
+      choices: [keyboard_response],
+      trial_duration: trial_duration,
+      post_trial_gap: post_trial_gap,
+      data: { correct: i >= n && trial_sequence[i].toLowerCase() === trial_sequence[i - n].toLowerCase() },
+      on_finish: function (data: any) {
+        data.correct_response = data.correct && data.response != null;
+        data.correct_no_response = !data.correct && data.response === null;
+      }
+    })
+  }
+
+
+  if (debrief){
+  if (return_accuracy){
+    timeline.push(
+      {
+        type: jsPsychHtmlKeyboardResponse,
+        stimulus: function(){
+          var correct_responses = jsPsych.data.get().filter({correct_response: true}).count();
+          var correct_no_responses = jsPsych.data.get().filter({correct_no_response: true}).count();
+          var total_trials = jsPsych.data.get().count();
+          var accuracy = Math.round(((correct_responses + correct_no_responses) / total_trials) * 100);
+          const return_prompt = (correct_response: number, correct_no_response: number, accuracy: number): string => {
+            return `<p>Thank you for participating!</p>
+                    <p>You correctly responded to <strong>${correct_response}</strong> matching trials.</p>
+                    <p>You correctly did not respond to <strong>${correct_no_response}</strong> non-matching trials.</p>
+                    <p>Your accuracy was <strong>${accuracy}%</strong>.</p>
+                    <p>Press any key to finish the experiment.</p>`;
+          };
+          return return_prompt(correct_responses, correct_no_responses, accuracy)
+        },
+        choices: "ALL_KEYS",
+        on_start: function () {
+          if (data_output == "csv"){
+          jsPsych.data.get().localSave('csv', `n_back.csv`);} else if (data_output == "json") {
+            jsPsych.data.get().localSave('json', `n_back.json`);
+          } else {return null}
+        },
+        simulation_options: {
+          simulate: false
+        }
+      })
+  } else {
+    timeline.push(
+      {
+        type: jsPsychHtmlKeyboardResponse,
+        stimulus: function(){
+          return `<p>Thank you for participating!</p>
+            <p>Press any key to finish the experiment.</p>`;
+        },
+        choices: "ALL_KEYS",
+        on_start: function () {
+          if (data_output == "csv"){
+            return jsPsych.data.get().localSave('csv', `n_back.csv`);} else if (data_output == "json") {
+              return jsPsych.data.get().localSave('json', `n_back.json`)
+            } else {return null}
+        },
+        simulation_options: {
+          simulate: false
+        }
+      })
+  }}
+
+  return timeline
+}
\ No newline at end of file
diff --git a/packages/n-back/tsconfig.json b/packages/n-back/tsconfig.json
new file mode 100644
index 0000000..33655f7
--- /dev/null
+++ b/packages/n-back/tsconfig.json
@@ -0,0 +1,10 @@
+{
+    "extends": "@jspsych/config/tsconfig.contrib.json",
+    "compilerOptions": {
+        "baseUrl": "."
+    },
+    "include": [
+        "src",
+        "../cli/src/build.js"
+    ]
+}
\ No newline at end of file
diff --git a/packages/stroop-task/README.md b/packages/stroop-task/README.md
new file mode 100644
index 0000000..6a26119
--- /dev/null
+++ b/packages/stroop-task/README.md
@@ -0,0 +1,71 @@
+# n-back
+
+## Overview
+
+A timeline for the nback task
+
+## Loading
+
+### In browser
+
+```html
+<script src="https://unpkg.com/@jspsych-timelines/n-back">
+```
+
+### Via NPM
+
+```
+npm install @jspsych-timelines/n-back
+```
+
+```js
+import { createTimeline } from "@jspsych-timelines/n-back"
+```
+
+## Compatibility
+
+`@jspsych-timelines/n-back` requires jsPsych v7.0.0 or later.
+
+## Documentation
+
+### createTimeline
+
+#### jsPsychTimelineNBack.createTimeline(jsPsych, { *options* }) ⇒ <code>timeline</code>
+This timeline describes an N-back task setup that is customizable based on several parameters, allowing researchers to control the level of difficulty, timing, and data output format.
+
+| Parameter           | Type                      | Default       | Description                                                                                   |
+|---------------------|---------------------------|---------------|-----------------------------------------------------------------------------------------------|
+| `stimuli`           | `any`                     |               | Stimuli array used in the N-back task, which can be customized based on the experiment needs. |
+| `keyboard_response` | `string`                  | `"space"`     | Key used by participants to respond during trials.                                            |
+| `trial_duration`    | `number`                  | `1000` ms     | Duration of each trial in milliseconds.                                                       |
+| `post_trial_gap`    | `number`                  | `500` ms      | Gap between trials in milliseconds.                                                           |
+| `fixation_duration` | `number`                  | `500` ms      | Duration of the fixation cross before each trial.                                             |
+| `n`                 | `number`                  | `2`           | Level of N-back, determining how many trials back the participant should remember.            |
+| `num_trials`        | `number`                  | `20`          | Total number of trials in the experiment.                                                     |
+| `rep_ratio`         | `number`                  | `0.2`         | Probability that a stimulus will repeat in the N-back sequence, affecting task difficulty.     |
+| `debrief`           | `boolean`                 | `false`       | Whether to show a debrief screen at the end of the task.                                      |
+| `return_accuracy`   | `boolean`                 | `false`       | Whether to return participant accuracy as part of the output data.                            |
+| `data_output`       | `"none"`, `"json"`, `"csv"` | `"none"`    | Specifies the format for saving output data, if any.                                          |
+
+## Reference for Standard Performance
+
+### Standard N-back Task Performance
+
+The following table summarizes the standard performance (accuracy and reaction times) for control subjects in the 1-back, 2-back, and 3-back tasks, as reported by Harvey et al. (2004).
+
+| Condition | Accuracy (%)      | Reaction Time (ms)         |
+|-----------|-------------------|----------------------------|
+| 1-back    | 96.5 (±3.6)       | 749.3 (±199.0)             |
+| 2-back    | 85.6 (±8.8)       | 1005.5 (±247.2)            |
+| 3-back    | 80.0 (±7.4)       | 1049.5 (±214.8)            |
+
+with a sample size of 22 individuals. 
+
+## Reference
+
+Harvey, P. O., Le Bastard, G., Pochon, J. B., Levy, R., Allilaire, J. F., Dubois, B., & Fossati, P. (2004). Executive functions and updating of the contents of working memory in unipolar depression. Journal of Psychiatric Research, 38(6), 567–576. https://doi.org/10.1016/j.jpsychires.2004.03.003
+
+## Author 
+
+Feng Wan
+
diff --git a/packages/stroop-task/docs/stroop-task.md b/packages/stroop-task/docs/stroop-task.md
new file mode 100644
index 0000000..778ef1c
--- /dev/null
+++ b/packages/stroop-task/docs/stroop-task.md
@@ -0,0 +1,51 @@
+# stroop-task
+
+Implementing stroop task in JsPsych Timelines
+
+## Parameters
+
+### Initialization Parameters
+
+Initialization parameters can be set when calling `initJsPsych()`
+
+```js
+initJsPsych({
+  timelines: [
+    {type: jsPsychTimelineStroopTask, params: {...}}
+  ]
+})
+```
+
+Parameter | Type | Default Value | Description
+----------|------|---------------|------------
+          |      |               |
+
+### Trial Parameters
+
+Trial parameters can be set when adding the timeline to a trial object.
+
+```js
+var trial = {
+  type: jsPsych...,
+  timelines: [
+    {type: jsPsychTimelineStroopTask, params: {...}}
+  ]
+}
+```
+
+Parameter | Type | Default Value | Description
+----------|------|---------------|------------
+          |      |               |
+
+## Data Generated
+
+Name | Type | Value
+-----|------|------
+     |      |
+
+## Functions
+
+If the timeline adds any static functions, list them here.
+
+### function()
+
diff --git a/packages/stroop-task/examples/index.html b/packages/stroop-task/examples/index.html
new file mode 100644
index 0000000..5beae07
--- /dev/null
+++ b/packages/stroop-task/examples/index.html
@@ -0,0 +1,44 @@
+<!DOCTYPE html>
+<html>
+
+<head>
+  <script src="https://unpkg.com/jspsych"></script>
+  <script src="https://unpkg.com/@jspsych-contrib/plugin-html-keyboard-response-raf"></script>
+  <script src="../dist/index.global.js"></script>
+  <link rel="stylesheet" href="https://unpkg.com/jspsych/css/jspsych.css">
+</head>
+
+<body></body>
+<script>
+
+  const timeline = []
+
+  const jsPsych = initJsPsych();
+
+  const instructions = {
+    type: jsPsychHtmlKeyboardResponseRaf,
+    stimulus: `
+      <p>Welcome to the Stroop task.</p>
+      <p>You will see words in different colors.</p>
+      <p>Name the color of the text instead of the text itself.</p>
+      <p>Press any key to begin.</p>
+    `
+  };
+
+  const stimuli = [
+    { word: 'RED', color: 'red' },     // Congruent
+    { word: "BLUE", color: "blue" },   // Congruent
+    { word: "GREEN", color: "green" }, // Congruent
+    { word: "RED", color: "blue" },    // Incongruent
+    { word: "BLUE", color: "red" },    // Incongruent
+    { word: "GREEN", color: "yellow" } // Incongruent
+];
+
+  const stroopTimeline = jsPsychTimelineStroopTask.createTimeline(jsPsych, stimuli, 48, 2000, 500, 500, true);
+
+  timeline.push(instructions, stroopTimeline)
+
+  jsPsych.run(timeline);
+</script>
+
+</html>
\ No newline at end of file
diff --git a/packages/stroop-task/jest.config.js b/packages/stroop-task/jest.config.js
new file mode 100644
index 0000000..bd1aace
--- /dev/null
+++ b/packages/stroop-task/jest.config.js
@@ -0,0 +1 @@
+module.exports = require("@jspsych/config/jest").makePackageConfig(__dirname);
\ No newline at end of file
diff --git a/packages/stroop-task/package.json b/packages/stroop-task/package.json
new file mode 100644
index 0000000..de56665
--- /dev/null
+++ b/packages/stroop-task/package.json
@@ -0,0 +1,37 @@
+{
+    "name": "@jspsych-timelines/stroop-task",
+    "version": "0.0.1",
+    "description": "Implementing stroop task in JsPsych Timelines",
+    "type": "module",
+    "main": "dist/index.mjs",
+    "types": "dist/index.d.ts",
+    "unpkg": "dist/index.browser.min.js",
+    "scripts": {
+      "build": "tsup src/index.ts --format esm,iife --sourcemap --dts --treeshake --clean --global-name jsPsychTimelineStroopTask"
+    },
+    "repository": {
+      "type": "git",
+      "url": "git+https://github.com/jspsych/jspsych-timelines.git"
+    },
+    "keywords": [
+      "jsPsych"
+    ],
+    "author": {
+      "name": "Feng Wan",
+      "url": "https://github.com/CharlieHFFF"
+    },
+    "license": "MIT",
+    "bugs": {
+      "url": "https://github.com/jspsych/jspsych-timelines/issues"
+    },
+    "homepage": "https://github.com/jspsych/jspsych-timelines/packages/stroop-task#readme",
+    "peerDependencies": {
+      "jspsych": "^8.0.1"
+    },
+    "dependencies": {
+    },
+    "devDependencies": {
+      "tsup": "^6.7.0",
+      "typescript": "^5.0.2"
+    }
+  }
\ No newline at end of file
diff --git a/packages/stroop-task/src/index.ts b/packages/stroop-task/src/index.ts
new file mode 100644
index 0000000..fd41b6d
--- /dev/null
+++ b/packages/stroop-task/src/index.ts
@@ -0,0 +1,42 @@
+import jsPsychHtmlKeyboardResponse from '@jspsych/plugin-html-keyboard-response'
+
+export function createTimeline(jsPsych: any, 
+    stimuli: any,
+    font: number = 48,  
+    trial_duration: number = 10000,
+    post_trial_gap: number = 500, 
+    fixation_duration: number = 500,
+    randomize_trials: boolean = true, 
+) {
+
+    const timeline = []
+
+    const fixation = {
+        type: jsPsychHtmlKeyboardResponse,
+        stimulus: `<p style="font-size: 48px; color: gray;">+</p>`,
+        choices: "NO_KEYS",
+        trial_duration: fixation_duration, 
+    }
+
+    const trial = {
+        type: jsPsychHtmlKeyboardResponse, 
+        stimulus: function() {
+            console.log("Stimuli:", stimuli);
+            console.log("color", jsPsych.evaluateTimelineVariable('color'))
+            return `<p style="color:${jsPsych.evaluateTimelineVariable('color')}; font-size:${font}px;">${jsPsych.evaluateTimelineVariable('word')}</p>`;
+        },
+        choices: "NO_KEYS", 
+        trial_duration: trial_duration, 
+        post_trial_gap: post_trial_gap, 
+    }
+
+    const full_trial = {
+        timeline: [fixation, trial], 
+        timeline_variables: stimuli, 
+        randomize_order: randomize_trials, 
+    }  
+
+    timeline.push(full_trial)
+
+    return timeline
+}
\ No newline at end of file
diff --git a/packages/stroop-task/tsconfig.json b/packages/stroop-task/tsconfig.json
new file mode 100644
index 0000000..33655f7
--- /dev/null
+++ b/packages/stroop-task/tsconfig.json
@@ -0,0 +1,10 @@
+{
+    "extends": "@jspsych/config/tsconfig.contrib.json",
+    "compilerOptions": {
+        "baseUrl": "."
+    },
+    "include": [
+        "src",
+        "../cli/src/build.js"
+    ]
+}
\ No newline at end of file