diff --git a/5_code_executor.py b/5_code_executor.py
new file mode 100644
index 0000000..4e3fbff
--- /dev/null
+++ b/5_code_executor.py
@@ -0,0 +1,73 @@
+# https://microsoft.github.io/autogen/docs/tutorial/code-executors/
+
+import os
+from dotenv import load_dotenv
+import tempfile
+# For 'import autogen' to work, had to 'pip install packaging'
+from autogen import AssistantAgent, UserProxyAgent
+from autogen.coding import DockerCommandLineCodeExecutor
+
+load_dotenv()
+
+# For some reason I need proxyman running and OPENAI_BASE_URL set to http://localhost:10800/v1 for this to work 🤷‍♂️
+llm_config = {
+    'model': 'gpt-4o',
+    'api_key': os.getenv('OPENAI_API_KEY'),
+    'base_url': os.getenv('OPENAI_BASE_URL') if os.getenv('OPENAI_BASE_URL') else None,
+}
+
+
+# Create a temporary directory to store the code files.
+# On macOS, the temporary directory gets created here and is automatically deleted when this script finishes.
+# /private/var/folders/pz/{random_string}/T/tmp{random_string}
+temp_dir = tempfile.TemporaryDirectory()
+
+# Create a Docker command line code executor.
+executor = DockerCommandLineCodeExecutor(
+    # Execute code using the given docker image name.
+    image="python:3.12-slim",
+    timeout=10,  # Timeout for each code execution in seconds.
+    # Use the temporary directory to store the code files.
+    work_dir=temp_dir.name,
+)
+
+code_executor_agent = UserProxyAgent(
+    "code_executor_agent",
+    # Use the docker command line code executor.
+    code_execution_config={"executor": executor},
+)
+
+code_writer_agent = AssistantAgent(
+    "code_writer_agent",
+    llm_config=llm_config,
+)
+
+chat_result = code_executor_agent.initiate_chat(
+    code_writer_agent,
+    message="Write Python code to calculate the 14th Fibonacci number.",
+)
+
+# Creates a file called calculate_fibonacci.py:
+# ----------------------------------------------------
+# ➜  tmpmzcowkow ls -al
+# total 8
+# drwx------    3 johnny  staff     96 31 May 08:07 .
+# drwx------@ 402 johnny  staff  12864 31 May 08:07 ..
+# -rw-r--r--    1 johnny  staff    240 31 May 08:07 calculate_fibonacci.py
+# ➜  tmpmzcowkow cat calculate_fibonacci.py
+# # filename: calculate_fibonacci.py
+
+# def fibonacci(n):
+#     a, b = 0, 1
+#     for _ in range(n):
+#         a, b = b, a + b
+#     return a
+
+# # Calculate the 14th Fibonacci number
+# fib_14 = fibonacci(14)
+# print(f"The 14th Fibonacci number is: {fib_14}")%
+# ----------------------------------------------------
+
+
+# When the code executor is no longer used, stop it to release the resources.
+# executor.stop()