(0:3) When somebody moves into object type #, - Closed
      (3:6) where the triggering furre moved into,
            (5:6) swap object types # and #.

(0:1) Whenever somebody moves,
   (1:5) and they successfully moved,
   (1:18) and they (moved from/are standing at) object type #, - open
            (5:6) swap object types # and #.