; grid_off.sfa - Thomas G. Ferguson, Abrams Planetarium, March 2002
; This file erases the standard grid.

0:00 buttons 2,6 play ./grid_on
     buttons 2,6 label 'Celest  On'
     declare global celestial
     adjust celestial brightness 0 /until +2
0:02 erase precess celestial
     end