​

function preload() {

  img = loadImage("assets/azurite.jpg");

}

​

function setup() {

  var c = createCanvas(600, 500);

  img.loadPixels();

}

​

function draw() {

var change = map(mouseX, 0, width, 0, 255);

change = Math.abs(change);

change = Math.floor(change);

​

for (i = 0; i < img.pixels.length; i = i + 4) {

  if (random(img.pixels[i]) >= 50) {

    img.pixels[i+1] = img.pixels[i-change];

  }

}

​

img.updatePixels();

image(img, 0, 0, 600, 500);

}