var r_noise;

​

var canvas_w = 500,

  canvas_h = 500,

  center_x = canvas_w / 2,

  center_y = canvas_h / 2;

​

function setup() {

  createCanvas(canvas_w, canvas_h);

  colorMode(HSB, 1);

  noStroke();

​

  stroke(0.1);

  fill(color(1, 0, 0))

​

  r_noise = random(1000);

}

​

function draw() {

  background(1, 0, 1, 0.2);

  r_noise += 0.05;

  for (var y = 0; y < canvas_h; y += 10) {

    for (var x = 0; x < canvas_w; x += 5) {

      var scale = 0;

      var dist_center = Math.sqrt(Math.pow(x - center_x, 2) +

        Math.pow(y - center_y, 2))

      if (dist_center > 100) {

        scale = (100 - dist_center) / 50

      var s = scale * 30 * noise(r_noise + y + (x / 100));

      rect(x, y - s, 1, 1)

      }

    }

​

  }

}