​

function setup() {

  createCanvas(400, 400);

}

​

function draw() {

  background(0);

  fill(random(0, 255));

  ellipse(100, 200, 100, 100);

​

  fill(map(noise(noisePos), 0, 1, 0, 255));

  noisePos = noisePos + 0.01;

  ellipse(300, 200, 100, 100);

}