
Edit: Adjusted link to point to the new version, which hopefully fixes the issues people have reported.
Perhaps you want to do something based on which person currently has the initiative? This script uses the API to find the token currently up in the initiative order and toggles an aura2 on them every 1.5 seconds.
https://gist.github.com/rlittlefield/5538171?1=4
While the initiative tracker does a fine job of helping you identify who's turn it is, this can help in situations where you need to keep things moving. It doesn't change the players' abilities to see the aura, so you will have to change that per-token. This was intentional (although could be changed easily) because you may not want to draw attention to your nefarious plans for some tokens.