How to create a logo that automatically changes every day?

[JoeM]

[quote M A V I C]Using PHP it's not too tough.

PS. Hit refresh and watch my sig change colors!
FWIW: sig is not changing colors for me on multiple refreshes( is that a word?), althought I remember seeing it red a few times.

You can also do it swapping out graphics in Javascript. There are scripts on the web.