iconifying all windows in fvwm

I added these lines in the end of Startup file of fvwm-crystal (~/.fvwm-crystal/preferences/Startup). These iconify all windows except the fvwm and desktop ones. delay is in milli-seconds.

#to iconify all windows except fvwm and the desktop ones
Schedule 10000 All ("*", !"Fvwm*|panel|gdeskcal") Iconify