createCanvas(400, 400);

}

​

function draw() {

  background(0);

  drawIt(200);

}

​

function drawIt(size) {

  noFill();

  rectMode(CENTER);

  stroke(random(0, 255), random(0, 255), random(0, 255));

  if (random(1, 6) == 1) ellipse(200, 200, size * random());

  else rect(200, 200, size);

  drawIt(size - 1);

}

​