let noiseScale;

​

function setup() {

  createCanvas(400, 400);

​

  pixelDensity(1);

}

​

function draw() {

  background(0);

  let noiseY = random(0.01);

​

  noiseScale = random(0.01)

  loadPixels();

  for (let y = 0; y < height; y++) {

    let noiseX = 0;

    for (let x = 0; x < width; x++) {

      let index = (x + y * width) * 4;

      let rand = noise(noiseX, noiseY) * 255;

      pixels[index + 0] = rand;

      pixels[index + 1] = rand;

      pixels[index + 2] = rand;

      pixels[index + 3] = 255;

​

      noiseX += noiseScale;

    }

    noiseY += noiseScale;

  }

  updatePixels();

}

​