:SlidingDoorOpen
   play DOOROPN
   nostopcutoff
end

:SlidingDoorClose
   play DOORCLOS
   nostopcutoff
end

[SlidingDoor
 door 0
 0  SlidingDoorOpen
 1  SlidingDoorClose
 2  SlidingDoorOpen
 3  SlidingDoorClose
]