Cooldown na dźwignie

on rightclick:
	if event-block is lever:
		if {lu::%event-block%} is not set:
			set {lu::%event-block%} to now
		else:
			if difference between {lu::%event-block%} and now is smaller than 1 second:
				cancel event
			else:
				set {lu::%event-block%} to now