This is an example of an animation used as the background of the table. The snow flakes are an animation about 30 pixels wide that has been tiled across the table. The air planes are a transparent gif animation. Transparent gif animations are not so easy to do. Go out on the web and look for instructions on how to do them. By simply making your gif transparent will give you a gray background instead of a true transparency. If you download this animation and open it in Photoshop, you will see it has a blue background that is not read by the browser. Copy this color and try it yourself.