White and black shapes over a white and black background. As the shapes move over the background, they transform colors so they are still defined. If you don't like the default Black-on-White color theme, you can choose your own colors for the background, background and foreground shapes, and where foreground and background intersect. You can also choose between three unique backgrounds, and decide how they should behave.
Version 1.2 has fixed an error that caused the product not to function correctly in resolutions other than 1024x768.