StumpWM has a timer system similar to that of Emacs.
Returns the time in seconds since idle according to the root window of the ‘screen’.
Perform an action after a delay of SECS seconds. Repeat the action every REPEAT seconds, if repeat is non-nil. SECS and REPEAT may be reals. The action is to call FUNCTION with arguments ARGS.
Remove TIMER from the list of active timers.
Return T if TIMER is a timer structure.