SOURCE

function setup() {
  createCanvas(540, 540);
  background(0);
  color = color('#ec94e5');
  colorMode('HSB',100);
}

var num = 0;
var angle = -Math.PI,
  r = 100;
var N = 14,
  n = 2;
var th, r, t;
var speed = 7e-3;
function walk() 
{
  var options = [{r: random(1, 5),l: 0}, 
                 {r: 0,l: PI / random(1, 10)}, 
                 {r: -random(1, 5),l: 0},
                 {r: 0,l: -PI / random(1, 10)},
                 {r: random(1, 5),l: PI / random(1, 10)},
                 {r: -random(1, 5),l: -PI / random(1, 10)
  }, {
      r: random(1, 5),
      l: -PI / random(1, 10)
  }, {
      r: -random(1, 5),
      l: PI / random(1, 10)
  }]

  var selected = random(options);
  angle += selected.l;
  r += selected.r;
}
function draw() {
  t = (Date.now() * speed) % 1;
 
  stroke(255);
    t = (Date.now() * speed) % 1;
    translate(width / 2, height / 2);

  for (var i = 0; i <20; i++) 
  {
     walk();
      for (var j = 0; j < 20; j++) {
        
          stroke(255 / 12 * i, num % 255, r)
          x = r * cos(angle + i * TWO_PI / 12);
          y = r * sin(angle + i * TWO_PI / 12);            
          th = TWO_PI * i / N;
          rotate(th);
          r = 130 + 90 * cos( TWO_PI * t );
          ellipse(r, y, 0.1, 0.1);
         
      }
  }
 
}

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