createCanvas(windowWidth, windowHeight);

  strokeWeight(8);

  stroke('orange');

  fill('blue');

}

​

function draw() {

  background(220, 20, 20);

  ellipse(frameCount, 120, 50, 50);

  ellipse(frameCount, 200, 50, 50);

  ellipse(frameCount, 160, 50, 50);

  ellipse(frameCount, 250, 50, 50);

}

​