​

​

function setup() {

  createCanvas(windowWidth, windowHeight);

}

​

function draw() {

  background(0);

  strokeWeight(4);

  stroke(255);

  noFill();

  for (var x = -100; x <= mouseX+20; x += 50) {

    for (var y = -100; y <= 100; y += 50) {

      fill(random(255), mouseX/5, random(255));

      ellipse(mouseX+x, mouseY+y, 25, 25);

    }

  }

}

​