This is a port of the code from here to JavaScript (modified slightly for performance reasons). It depends on the <canvas> tag, so you'll need a web browser like SeaMonkey 1.0, Firefox 1.5, Camino 1.0, Safari, or newer (I only tested with SeaMonkey though). Your browser is probably going to hang for a couple of seconds when you click "Begin".

Colorize (SLOW)

Your browser doesn't support a required feature (the HTML Canvas tag). You could get a better browser (or this one, or, if you're on a Mac, Safari).

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