How difficult would it be for me to add a rotating light effect to my lighthouse logo? I know absolutely nothing about Flash or animation.

I made the logo in Illustrator, and would like a simple rotating light, nothing irritating to viewers.

Or maybe if someone feels especially generous, and could help me add this to my logo for my web presence.

Thanks in advance
Ceara

PS Edited to add that my avatar is not the lighthouse graphic in question.