How To Have A Rss Feed Gadget Have Different Skins Or Themes?

Question

Hey everyone I am a newbie here and for making gadgets. I made a rss feed gadget for the forum I am on and the members want the gadget to have different skins or themes to choose from. How am I able to do this? I have tried to use different html and css codes for this and I can't seem to get it to work and Ive  spent many hours on this! Can anybody please help me?? If need be I can upload the gadget or files some where so a nice person might want to help me out. Thanks for your time!!