supertux/data/images/creatures/flame/flame.sprite

(supertux-sprite
 (action
  (hitbox 0 0 31.8 31.8)
  (name "normal")
  (images "flame-0.png"
          "flame-1.png"))
 (action
  (hitbox 0 0 31.8 31.8)
  (name "fade")
  (fps 5)
  (images "flame-1.png"
          "flame-fade-0.png"
          "flame-fade-1.png"
          "flame-fade-2.png"
          "flame-fade-3.png"))
)