createCanvas(400, 400);

  noLoop();

}

​

function draw() {

  let noiseLevel = 255;

  let noiseScale = 0.02;

  let reflection = [];

​

  background('blue');

  for (let y = 0; y < height; y += 1) {

    for (let x = 0; x < width/2; x += 1) {

      // Scale input coordinates.

      let nx = noiseScale * x;

      let ny = noiseScale * y;

      // Compute noise value.

      let c = noiseLevel * noise(nx, ny);

      // Render.

      stroke(c);

      reflection.push(c);

      point(x, y);

    }

    for(let x = 0; x < width/2; x += 1) {

      let c = reflection.pop();

      stroke(c);

      point(x+width/2, y);

    }

  }

​

}