supertux/data/images/objects/door/door.sprite

(supertux-sprite
  (action
    (name "closed")
    (hitbox 8 4 44 92)
    (images 
      "door-0.png")
  )
  (action
    (name "opening")
    (hitbox 8 4 44 92)
    (fps 10)
    (loops 1)
    (images 
      "door-0.png"
      "door-1.png"
      "door-2.png"
      "door-3.png"
      "door-4.png"
      "door-5.png"
      "door-6.png"
      "door-7.png")
  )
  (action
    (name "open")
    (hitbox 8 4 44 92)
    (images 
      "door-7.png")
  )
  (action
    (name "closing")
    (hitbox 8 4 44 92)
    (fps 10)
    (loops 1)
    (images 
      "door-7.png"
      "door-6.png"
      "door-5.png"
      "door-4.png"
      "door-3.png"
      "door-2.png"
      "door-1.png"
      "door-0.png")
  )
)