​

function setup() {

  createCanvas(400, 400);

  rectMode(CENTER);

  angleMode(DEGREES);

}

​

function draw() {

  for (let x = 0; x < width; x += 100) { 

  for (let y = 0; y < height; y += 100) { 

  stroke(mouseY, mouseX, random(50,300),random(0,150));

  strokeWeight(random(0,30-mouseX));

  push();

  translate(width/2,height/2);

  rotate(a);

  rect(x,y,40,40);

  pop();

    }

  }

  a = a + 1;

}