; butterfly_on.sfa - John French, Abrams Planetarium, March 2002
; This file draws the butterfly.

0:00 buttons 4,1 play ./butterfly_off
     buttons 4,1 label 'butterfly  Off'
     declare global butterfly
     adjust butterfly def pic butterfly-rt
     adjust butterfly brightness 0
+0.2 draw galactic butterfly
     adjust butterfly draw 2
     adjust butterfly brightness 100 /until +2
     end