DestroyFunc FuncFvwmStartThemeBackground
AddToFunc   FuncFvwmStartThemeBackground
+ I Exec exec fvwm-themes-images --sky --sky-colors random,random,random --pattern-type 1 --setroot --be-fast

DestroyFunc FuncFvwmStopThemeBackground
AddToFunc   FuncFvwmStopThemeBackground
+ I Nop
