// Daniel Shiffman

// http://natureofcode.com

​

function setup() {

  createCanvas(640, 240);

​

  // Tell p5 we will work with pixels

  loadPixels();

  let xoff = 0.0;

​

  // Updating pixels with perlin noise

  for (let x = 0; x < width; x++) {

    let yoff = 0.0;

​

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

      // Calculating brightness value for noise

      const bright = map(noise(xoff, yoff), 0, 1, 0, 255);

      set(x, y, floor(bright));

      yoff += 0.01; // Incrementing y-offset perlins noise

    }

    xoff += 0.01; // Incrementing x-offset perlins noise

  }

​

  updatePixels();

}

​

function draw() {}

​