Refractoring

function setup() {

  createCanvas(500, 500);

  noLoop();

}

​

function draw() {

  background(255);

  noStroke();

​

  let originalX = 0;

  let originalY = 0;

  let originalSize = 100;

​

  while (originalX < width) {

    fill(randomColour());

    square(originalX, originalY, originalSize);

​

    originalX += 50;

    originalY += 50;

    originalSize -= 10;

  }

}

​

// creates and returns random colour

function randomColour() {

  push();

  colorMode(HSB)

  const result = color(random(360), 80, 100, 0.5);

  pop();

  return result;

}

​

// changes colour of square when mouse pressed

function mousePressed() {

  redraw();

}