DestroyFunc FuncFvwmStartThemeBackground
AddToFunc   FuncFvwmStartThemeBackground
+ I Exec exec fvwm-themes-images --sky --sky-colors random,random --pattern-type uniform:50 --setroot -pattern-y 50

DestroyFunc FuncFvwmStopThemeBackground
AddToFunc   FuncFvwmStopThemeBackground
+ I Nop
