is there some plugins that can show alternating pictures at the sidebar?

I am searching for a plugin to show my picture in a folder at the sidebar, it may pick random picture from the folder, and show them alternated at a little square place. It maybe support the JS fade-in and fade-out effect or make a short flash for that. Is there some plugin is like the description above?

I am a rookie in php and hard to write this plugin by myself.

thanks for your help/