If you’re running a WebGL compliant web browser, you can head on over to Shader Toy and interactively build Pixel Shaders in your browser and see the results.  This is all possible thanks to the new WebGL support and enables an incredible level of experimentation and interactivity, directly in the browser.

Unfortunately I’m not near a WebGL browser at the moment. Someone take a Pic and send it to us, and I’ll be happy to include it!