Raging Bull v1.0

//29 Sep 20 Raging Bull "to tame a raging bull with an infinite field" but starting first with a simpler circle that changes when mouse is moved.
// Able to get the color change as desired. 
//Added mouseclick to reset world statem
// p5JS code

// Wishlist of program below

//WorldState -> image
//this function set-up the initial world state

//given:  expect: 
//canvas:  should be 200 pixels by 400 pixels
//starting image: circle, black

//WorldState (image Clocktick Mouse-events) -> WorldState (image)
// Calls the functions for image, clock tick, mouse events to affect new world-state
// starting image’s movement: random vibration on x and y axis
// clock tick: call
// Mouse event function: call

//Clock tick -> WorldState
//With each passing tick, 1) movement of image reduces to zero, and 2) color gradually reduces to white 
// ideally, 1) & 2) happens very slowly (over 3mins/180s)

//Mouse event function 
// with every movement of the mouse, the world state’s movement goes back to the initial 
// with every moment of the mouse, the world state’s movement increases


function setup() {
  createCanvas(400, 400);

}

let value = 0;
let circleX = 200;
let circleY = 200;
let perturbation = 5;
let clockSwitch = true; // Boolean to turn on/off clock
function draw() {
  background(255);
  clockTick();
  //mouseMoved();
  circleImage();
}

function circleImage() {
  fill(value);
  circle(circleX, circleY, 150);
  circleX += random(-perturbation, perturbation);
  if (circleX < 0 || circleX > 400) {
    circleX = 200;
  }
  circleY += random(-perturbation, perturbation);
  if (circleY < 0 || circleY > 400) {
    circleY = 200;
  }
}

function mouseMoved() {
  value = value - 15;
  perturbation = 5;
  clockSwitch = true;
  // if (value > 255) {
  // value = 0;
  //}
  return false;
}

function mousePressed() {
  value = 0;
}

//With each passing tick, 1) movement of image reduces to zero, and 2) color gradually reduces to white 
// ideally, 1) & 2) happens very slowly (over 3mins/180s)
function clockTick() {

  let timer = millis();
  if (timer > 0) {
    value += (255 / 600);
    perturbation -= (5 / 600);
    if (perturbation < 0) {
      perturbation = 0;
    }
  } else if (timer > 600) {
    value = 255;
    perturbation = 0;
    clockSwitch = false;
  }

}