A nice effect that I use frequently on my site (kirupa.com) is the image scroll. Unlike image scrolls you may see on other sites, you are going to make the scroll continuous without any breaks or gaps. The following animation is an example of what you will have created by the time you reach the end of this tutorial:

[ clouds scrolling ]

Scrolling Image

Before we start, please download the partial source. Don't worry, the partial source will not have the key elements to make it work...you'll do that with the information found in this tutorial.