Rainbow color for groups

Hai guys.

I would love to add rainbow color ( the one that changes color all the time) on groups.

Any help ?

I have no idea how to do this but i have asked a question like this before and was given this site
http://rainbow.arch.scriptmania.com/tools/rainbow_text/

Its really cool and it works you enter your text in the box on the left and press the submit button then on the right you will see a box with a HTML code in side of it, copy that code and it will make it in rainbow!
If you would like to see an example visit this page on my forum i will put a paragraph in the rainbow font for you to see!!

you can see the example here:
http://sir-mayo.forumotion.com/h3-rainbow-text

 I hope this helps you some what. And sorry for the long post
 ETA: when i said i have no idea how to do this i meant make it changing like you asked, I would like to no that as well but i do know how to make it stay a set way for ever!