supertux/data/particles/custom/default.stcp

(supertux-custom-particle
  (z-pos 0)
  (main-texture "/images/engine/editor/sparkle.png")
  (amount 10)
  (delay 0)
  (lifetime 1.25)
  (birth-time 0)
  (death-mode "fade")
  (death-time 0.75)
  (speed-var-x 256)
  (speed-var-y 256)
  (cover-screen #f)
)