HTML5 is supported by more and more browsers. It has a nice feature called the ‘canvas’ element. It is an element on which you can ‘paint’ using e.g. JavaScript. I experimented with this new canvas element. You can view the experiments (clock, 3D-axis and rotation, ray tracer) and view the source too! The ray tracer should be activated in Chrome or Safari as Firefox and Internet Explorer tend to be (very) slow.