Counter within a box

i’m making a small game for Math Extra Credit, where you have to push with your char runes into a rune circle, and it’ll summon a demon (dope, eh?). anyone know how i can make it so i have a counter where if the runes are in the rune circle (currently an invisible ghost box matched up with a tex on the floor) it has the counter has one, and when it’s out it will subtract one (or go back to 0)?
tell me if this is unclear, rushed this post

yes, it’s quite unclear?! :slight_smile:
This old tut show you a way to make a counter ( there’s others):