190721

function setup() {

  createCanvas(windowWidth, windowHeight);

  colorMode(HSB, 360, 100, 100, 100);

  angleMode(DEGREES);

  background(0, 0, 10);

}

​

function draw() {

  blendMode(BLEND);

  background(0, 0, 10, 30);

  blendMode(ADD);

  randomSeed(1000);

  for (let r = 1000; r > 0; r -= 10) {

​

    push();

    translate(width / 2, height / 2);

    let m = random(1, 3);

    scale(tan(frameCount + r) * m);

    rotate(random(360) + frameCount / m);

    let n = int(random(3, 10));

    for (let i = 0; i < n; i++) {

      let angle = map(i, 0, n, 0, 360);

      let x = cos(angle) * r;

      let y = sin(angle) * r;

      let d = map(n, 3, 10, 30, 5);

      noStroke();

      fill(r % 360, 80, 100);

      ellipse(x, y, d, d);

    }

    pop();

  }

}