cssAudio - Activefile-genericCSS - ActiveGeneric - ActiveHTML - ActiveImage - ActiveJS - ActiveSVG - ActiveText - Activefile-genericVideo - ActiveLovehtmlicon-new-collectionicon-personicon-teamlog-outoctocatpop-outspinnerstartv

Pen Settings

CSS Base

Vendor Prefixing

Add External CSS

These stylesheets will be added in this order and before the code you write in the CSS editor. You can also add another Pen here, and it will pull the CSS from it. Try typing "font" or "ribbon" below.

Quick-add: + add another resource

Add External JavaScript

These scripts will run in this order and before the code in the JavaScript editor. You can also link to another Pen here, and it will run the JavaScript from it. Also try typing the name of any popular library.

Quick-add: + add another resource

Code Indentation


Save Automatically?

If active, Pens will autosave every 30 seconds after being saved once.

Auto-Updating Preview

If enabled, the preview panel updates automatically as you code. If disabled, use the "Run" button to update.

              <div id="container">
    <label for="upload-image">1. upload an image</label>
    <input type="file" id="upload-image" name="upload-image" />

  <p id="frame-container">
    <canvas id="frame-canvas"></canvas>

<div id="menu"> 

  <div class="tray">
    <p><a href="index.html">SEURAT.EXTEND()<br /> a <code>var t;</code> demo</a></p>
    <p><small>upload an image, get an art<br /><a href="index.html">learn about  george-pierre seurat</a></small></p>
      <button id="clear">Clear</button>
      <button id="save">Save</button>
              body {  overflow: hidden; font-family: Helvetica; padding: 1em; }

#container p { margin: 0 0 2em; }
label { font-weight: bold; text-transform: uppercase; font-size: 1.5em; display: block; margin: .5em 0; }

#menu { position: absolute; top: 10px; right: 10px; text-align: right;   }
#menu a { text-decoration: none; color: black; font-weight: bold; font-size: 1.2em; }
#menu p { margin-bottom: 10px; }
#menu small { font-family: monospace; }

.hide { display: none; }
  var uploadInput = document.getElementById('upload-image');
  var frameContainer = document.getElementById('frame-container');
  var canvas = document.getElementById('frame-canvas');
  var ctx = canvas.getContext('2d');

  var buttonClear = document.getElementById('clear');
  var buttonSave = document.getElementById('save');
  var pixelSize = 15;
  var framePixelWidth;

  var calculateFrameSize = function(dimension) {
    // returns computer-pixel width of frame
    var size = pixelSize * Math.ceil( (dimension * .1) / pixelSize) ;
    return size;
  /** EVENTS **/

  // when uploading an image, embed it onto canvas and show it
  uploadInput.onchange = function(){

    // embed image onto canvas
    var uploadedImage = uploadInput.files[0];
    var reader = new FileReader();
    reader.onload = function(e){
      var img = new Image();
      img.onload =function() {
        // calculate frame width off of smallest dimension
        var frameSize = calculateFrameSize(Math.min(img.width, img.height));
        canvas.style.backgroundColor = 'hotpink';
        canvas.width = img.width + 2 * frameSize;
        canvas.height = img.height + 2 * frameSize;
      img.src = e.target.result;

    // show sketch container
    frameContainer.style.display = "block";

  // clear canvas when clear button clicked
  buttonClear.onclick = function(){
    ctx.fillStyle = "#ffffff";

    frameContainer.style.display = 'none';

  // open png in new window when save button clicked
  buttonSave.onclick = function(){


Asset uploading is a PRO feature.

As a PRO member, you can drag-and-drop upload files here to use as resources. Images, Libraries, JSON data... anything you want. You can even edit them anytime, like any other code on CodePen.


Loading ..................