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Here you can Sed posuere consectetur est at lobortis. Donec ullamcorper nulla non metus auctor fringilla. Maecenas sed diam eget risus varius blandit sit amet non magna. Donec id elit non mi porta gravida at eget metus. Praesent commodo cursus magna, vel scelerisque nisl consectetur et.

              <h3>Image creation Timelaps</h3> 
<p>This page is a timelaps of the following Codepen: <a target="_blank" href="https://codepen.io/jwillmer/pen/eWdowe">Every day a pixel</a>.</p>
<canvas id="canvas"></canvas>
<canvas id="canvasHidden"></canvas>
<p>The image is now <span id="years">0</span> years old.</p>
              #canvasHidden {
  display: none;  

#canvas {
  border: 2px solid lightgrey;

body {
  display: flex;
  flex-direction: column;
  align-items: center;
              // Settings ===================
var renderSpeed = 100;
var imgUrl = "https://jwillmer.de/media/img/2017-04-25-every-day-a-pixel-abstract-painting.jpg";

// Code =======================
var years = document.getElementById('years');
var img = new Image;
img.onload = function() {
  var canvas = getEmptyCanvas(img.width, img.height);
  var context = canvas.getContext('2d');    
  var hiddenCanvas = setHiddenCanvas(img);  
  var hiddenContext = hiddenCanvas.getContext('2d');
  render(context, hiddenContext);  
img.src = imgUrl;

function render(context, hiddenContext) {
    var maxWidth = hiddenContext.canvas.width;
    var maxHeight = hiddenContext.canvas.height;
    var maxPixels = maxWidth * maxHeight;    
    var renderedPixels = 0;
    var timer = setInterval(function() {        
      if(renderedPixels < maxPixels){   
        var pixelsLeft = maxPixels - renderedPixels;
        renderSpeed = pixelsLeft > renderSpeed ? renderSpeed : pixelsLeft;
        renderPixels(context, hiddenContext, renderSpeed);  
        renderedPixels += renderSpeed;
      } else {
      // Break for development
      // clearInterval(timer);
    }, 10);

function updateAge(pixelCount){
    years.innerHTML = Math.floor(pixelCount/365);

function renderPixels(context, hiddenContext, amount) {
  for(var n = 0; n < amount; n++){
    renderPixel(context, hiddenContext);

function renderPixel(context, hiddenContext) {
  var coordinate = randomEmptyCoordinate(context, hiddenContext);
  var imageData = hiddenContext.getImageData(coordinate[0], coordinate[1], 1, 1);
  context.putImageData(imageData, coordinate[0], coordinate[1]);

var pixelMap;
function createPixelMap(context){
    var width = context.canvas.width;
    var height = context.canvas.height;
    var pixels = width * height;  
    pixelMap = Array.from(Array(pixels).keys());

function pixelMapNumberToCoordinate(width, number) {  
  var y = Math.floor(number/width);
  var x = number % width;
  return [x, y];

function randomEmptyCoordinate(context, hiddenContext) {
  var width = context.canvas.width;
  var length = pixelMap.length; 
  var position = Math.floor(Math.random() * length + 1); 
  var coordinate = pixelMapNumberToCoordinate(width, pixelMap[position]);
  pixelMap.splice(position, 1);
  return coordinate;

function getEmptyCanvas(width, height) {
   var canvas = document.getElementById('canvas');
  canvas.width = width;
  canvas.height = height;
  return canvas;

function setHiddenCanvas(img) {
  var canvas = document.getElementById('canvasHidden');
  canvas.width = img.width;
  canvas.height = img.height;
  var ctx = canvas.getContext('2d');
  ctx.drawImage(img, 0, 0, img.width, img.height);
  return canvas;  
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