normal script line 0
; normal script line 1
normal script line 2
/* normal script line 3
normal script line 4 */

normal script line 5
#Group1 on
normal script line 7
#Group1 end
normal script line 9
#Group3 off
normal script line 11
#Group3 end

normal script line 13

Not necessarily those colors, but you get the idea. Just so comments and inactive groups can be noticed at a quick glance.