DestroyFunc FuncFvwmStartThemeBackground
AddToFunc   FuncFvwmStartThemeBackground
+ I Exec exec fvwm-themes-images --sky --sky-colors black,white --pattern-type square:50 --sky-comp c --setroot --pattern-y 100

DestroyFunc FuncFvwmStopThemeBackground
AddToFunc   FuncFvwmStopThemeBackground
+ I Nop