Turn Counter

I’m using a turn counter to keep track of who the active player is. I’ve got it set up with a playerlist, populated by the names of the 4 player sides, and set to wrap. What I would like to do it, when I click a separate button I made, for it to automatically move the turn counter to the next player on the list. I know how to do it if the turn counter is just using numeric values, but can’t figure out how to do it when the counter is populated by a non-numerical list.