timedelay − The equivalent of a time-delay relay
loadrt timedelay [count=N|names=name1[,name2...]]
(requires a floating-point thread)
bit out Follows the value of in after applying the delays on-delay and off-delay.
float in (default: 0.5) The time, in seconds, for which in must be true before out becomes true
float in (default: 0.5) The time, in seconds, for which in must be false before out becomes false
float out Current value of the internal timer
Jeff Epler, based on works by Stephen Wille Padnos and John Kasunich