More or less "Hello World" for HTML5 and WebGL. On the left-hand side of the page you can see the color gradient used to render the fractal, and by clicking on the labels along the gradient you can configure it to render in any colors you like. (it will also randomly regenerate the gradient if the page is reloaded, but this doesn't usually produce pleasant color combinations)
NOTE: It will render at the size of your browser window! If you have performance issues, try resizing your browser.