​

var x;

var y;

​

var r = 60;

var s = 25;

​

function setup() {

  createCanvas(windowWidth, windowHeight);

  background(0);

​

  _h = random(0, 360);

  x = random(0, width);

  y = random(0, height);

}

​

function draw() {

  background(0, 0);

​

    noStroke();

    colorMode(HSB);

​

    _h = (_h + (random(-20, 20) % 360) + 360) % 360;

    fill(_h, 40, 100);

    circle(x, y, r);

​

  x = (x + (random(-s, s) % width) + width) % width;

  y = (y + (random(-s, s) % width) + width) % width;

}

​