1st page of animated backgrounds

Here you can find some examples of animated backgrounds. Most of them are too annoying for actual use, but they prove the concept. Both Netscape and Microsoft Internet explorer now support animated GIFs as backgrounds. The simple requirement to animated GIFs to make them usable as backgrounds is that the GIFs should be designed to smoothly connect to their copies both vertically and horizontally (usual requirement for backgrounds) in every frame of the animation.