createCanvas(300, 600);

}

​

function draw() {

  // let's save frameCount into a time variable t, and scale it slower for

  // smoother motion

  let t = frameCount * 0.005;

  background(220);

  noStroke();

  // let's iterate over the canvas but for speed we'll jump by 3 instead of

  // by one

  for (let i = 0; i < width; i += 3) {

    for (let j = 0; j < height; j += 3) {

      // use noise to color this "pixel", and use t to change over time

      let n = noise(i * 0.005 + t, j * 0.005, t);

      fill(n * 255);

      // draw the "pixel"

      rect(i, j, 3);

    }

  }

}