​

function setup() {

  createCanvas(400, 400);

}

​

function draw() {

  colorMode(HSB);

  background(map(sin(angle), -1, 1, 0, 360), 100, 100);

  colorMode(RGB);

​

  strokeWeight(1);

  fill(255, 204, 51);

  ellipse(200, 200, 150, 150);

  fill(0);

  let eyesLength = map(sin(angle), -1, 1, 3, 7);

  ellipse(177, 177, eyesLength, 3);

  ellipse(223, 177, eyesLength, 3);

  noFill();

  strokeWeight(2);

  let mouthOffX = map(sin(angle), -1, 1, 3, 20);

  bezier(177, 224, 177, 224 + mouthOffX, 223, 224 + mouthOffX, 223, 224);

​

  angle = angle + 0.01;

}