function setup() {

  createCanvas(400, 400);

  vehicles=  [];

  for(var i = 0; i < 10; i++) {

    var v = {

      xNoise: new NoiseLoop(random(0.1, 1), -width / 2, width / 2),

      yNoise: new NoiseLoop(random(0.1, 1), -height / 2, height / 2),

      angle: 0 

    }

    vehicles.push(v);

  }

}

​

function draw() {

  background(220);

  noFill();

  stroke(255, 0, 255);

  for(var i = 0; i < vehicles.length; i++) {

    var v = vehicles[i];

    ellipse(v.xNoise.value(v.angle), v.yNoise.value(v.angle), 16, 16);

    v.angle += radians(1);

  }

}

​

function NoiseLoop(diameter, min, max) {

    this.diameter = diameter;

    this.min = min;

    this.max = max;

    this.cx = random(0, 1000);

    this.cy = random(0, 1000);

}

NoiseLoop.prototype.value = function(angle) {

    var xOff = map(sin(angle), 0, 1, this.cx, this.cx + this.diameter);

    var yOff = map(cos(angle), 0, 1, this.cy, this.cy + this.diameter);

    return map(noise(xOff, yOff, 0), -1, 1, this.min, this.max);

}