; gem_off.sfa - Thomas G. Ferguson, Abrams Planetarium, Feb. 2002
; gem_off.sfa - John French, Abrams Planetarium, Mar. 2002
; gem_off.sfa - Flamsteed drawings - Chris Anderson, Falkner Planetarium,  2001
; This file erases the artwork for GEM.

0:00 buttons 4,12 play ./gem_on
     buttons 4,12 label 'GEM   picO'
     declare global GEM
     adjust GEM brightness 0 /until +2
0:02 erase galactic GEM
     end