Chapter 17: Graphics
A web page without images is very boring, and visitors will
probably not stay very long. There are a couple of clever things
that can be achieved with images:
Images
which are in GIF format can be animated. The specific GIF
format which allows for animation is GIF89a.
Creating animated GIFs is really very simple. You need to
create a small GIF for each frame of your animation. This
may result in several GIF files. Then, use a utility such
as GIF
Construction Set (Win95/NT, 1.2MB), to create a
single animated GIF image from your separate GIF files.
This is an example of an animated GIF:

Tips and Tricks
Some tips for creating web-friendly images: