DestroyFunc FuncFvwmStartThemeBackground
AddToFunc   FuncFvwmStartThemeBackground
+ I Exec exec fvwm-themes-images --sky --sky-colors "#0000b8,#0000ff,#00ffff" --pattern-type 1 --setroot --rotate 90 --be-fast

DestroyFunc FuncFvwmStopThemeBackground
AddToFunc   FuncFvwmStopThemeBackground
+ I Nop
