An animated GIF, is a file made up of layers of images, stacked one on top of the other.
In each layer, the image is a little bit different than the previous image.
So, when each image is "flipped through" at a given speed, the image appears to move, like the old flip-books we used to make as kids.
This is a rather simplistic explanation, but that's how it basically works.
Here's a YouTube vid that shows what I'm talking about:
[Flipbook]Action StudyThis explains how it works:
The FLIP BOOKSo, the first thing you need is a group of images, each slightly different than the other.
Then you'll need a program to "stitch" them together.
An easy program to use, for that, is
UnFREEz.