This goes in the onEnter event of a trigger. Lay it down where a player cant miss it. Since it's using the area itself to store the data it needs instead of the trigger, you can lay down several triggers, at several doors, and they'll all act as if they were the same trigger. Oh, when you fill up the area with way points ? WP_CHEST is the one, and make sure the wide end faces where the player must stand to open it.