supertux/data/images/objects/pushbutton/pushbutton.sprite

(supertux-sprite
  (action
    (name "off")
    (hitbox 1 2 30 14)
    (images "pushbutton-0.png")
  )
  (action
    (name "on")
    (hitbox 1 2 30 8)
    (images "pushbutton-1.png")
  )
)