(0:1) Whenever somebody moves,
   (1:3) and they move into object type #,
   (1:19) and they (moved from/are standing at) position (#,#),
(0:100) When # seconds have passed, offset by #,
      (3:2) at position (#,#) on the map,
            (5:400) Cycle the three object types in this sequence one step forward: #, #, #.