let paused = false;

let r, t;

function setup() {

  createCanvas(800, 800);

  background(220);

  noStroke();

  r = width/4;

  t = 0;

}

​

function draw() {

  if (!paused) {

    translate(width/2,height/2);

    let x = r*cos(t);

    let y = r*sin(t);

    t += PI/256;

    drawSplotch(x, y, random(palette));

  }

}

​

function drawSplotch(x, y, c) {

  let _c = color(c);

  _c.setAlpha(random(60,180));

  fill(_c);

  push();

  translate(x,y);

  let _tstart = random(0,TWO_PI);

  let _endt = _tstart + TWO_PI;

  let _step = TWO_PI/32;

  let _r = random(50,100);

  beginShape();

  for (let _t = _tstart; _t < _endt; _t += _step) {

    let _x = (_r * cos(_t))+random(-_r/2,_r/2);

    let _y = (_r * sin(_t))+random(-_r/2,_r/2);

    _t += random(-_step,_step);

    vertex(_x,_y);

  }

  endShape(CLOSE);

  translate(-x,-y);

  pop();

​

  /*

  for (let _ = 0; _ < 100; _++) {

    let _w = random(1, 50);

    let _w2 = _w/2;

    _c.setAlpha(random(120, 220));

    fill(_c);

    ellipse(x + random(-_w, _w), y + random(-_w, _w), _w+random(-_w2,_w2), _w+random(-_w2,_w2));

  */

}

​

function keyPressed() {

  if (key == " ") paused = !paused;

}

​