How To Make A Name Flash Different Colors?

[KbttwForums]

How would i go about making usernames flash different colors.
Like admins flash black an red.

Ive seen on a few sites that they have flashing for like top posters.
But it works on all browsers an i have seen some people say it wont so please help

[Lynne]

Post a link where they do this so we can see the page source for how they did it.