(0:100) When 1 seconds have passed, offset by 0,
   (1:200) and variable %movement is equal to 1,
       (3:500) at a random spot within the rectangle (14,18) - (14,28),
         (4:3) only where an object type 8 is,
            (5:5) change object type 8 to type 0.
         (4:3) only where an object type 0 is,
            (5:5) change object type 0 to type 8.