supertux/data/images/creatures/mole/mole_rock.sprite

(supertux-sprite
  (action
    (name "variant-1")
    (hitbox 5 6 15 15)
    (images 
      "mole_rock-0.png"
    )
  )
  
  (action
    (name "variant-2")
    (hitbox 5 6 15 15)
    (images 
      "mole_rock-1.png"
    )
  )
  
  (action
    (name "variant-3")
    (hitbox 8 8 11 11)
    (images 
      "mole_rock-2.png"
    )
  )
)