​

function setup() {

  createCanvas(600, 400);

}

​

function mouseDragged() {

  let r = random(10, 40);

  let b = new Circle(mouseX, mouseY, r);

​

    circles.push(b);

}

​

function draw() {

  background(51);

  for (let i = 0; i < circles.length; i++) {

    circles[i].move();

    circles[i].show();

    circles[i].col();

  }

}