Here's a rather basic script that I think is pretty helpful. The script isn't on this page because I'm not running it. You see -- it takes eight images to make it all run and I am far too lazy to create eight images. So, I'll tell you what it does and you can take it from there.
The script posts a different background and image depending on the time of day. You could have flowers in the morning and stars at night.
You'll see where to change out background images when you:
Please note: This script is being offered in simple text format. When you click to Grab the Script, the text should display. Internet Explorer and AOL users may get a blank page or the script may run and produce the effect. If this happens, choose SAVE AS from the FILE menu and save the blank or compiled page.