​

let white = false;

​

function setup() {

  createCanvas(400, 400);

  background(255);

  addEffects(

    noiseDisplacement(0.01),

    edgeColor(hsvToRgb(vec4(op(time(), "+", len(pos())), 1, 1, 1)))

  );

}

​

function draw() {

  if (white) {

    fill(255, 255, 255);

  } else {

    fill(0, 0, 0);

  }

  noStroke();

  ellipse(mouseX, mouseY, 20 + (r = 60 * Math.random()), 20 + r);

}

​

function mouseClicked() {

  white = !white;

}

​