createCanvas(400, 400);

}

​

function draw() {

  loadPixels();

  let pixelIndex;

  for (let x = 0; x < width; x++) {

    for (let y = 0; y < height; y++) {

      pixelIndex = (x + y * width) * 4;

      pixels[pixelIndex] = map(x ** 2, 0, width ** 2, 0, 256);

      pixels[pixelIndex + 1] = random(50);

      pixels[pixelIndex + 2] = map(y, 0, height, 0, 256);

      pixels[pixelIndex + 3] = 255;

    }

  }

  updatePixels();

}