jak zrobić Cooldown

Witam, jak zrobić Cooldown(czas odnowienia).

Narazie posiadam:

	On rightclick:
    if player is holding stick named "&bWyssanie Życia":
        if player has permission "czlowiek.1":
            if difference between {Czlowiek1::%player%::lastuse} and now is smaller than 35 seconds:
                send "&c%difference between {Czlowiek1::%player%::lastuse} and now% sekund do odnowienia!"
                stop
            set {Czlowiek1::%player%::lastuse} to now
            send "&aUżyłeś umiejetnosci!"
            spawn 2000 of particle Magic Crit:1 offset by 0, 5, 0 at player
	            loop all entities within 5 meters of the player:
	                damage loop-entity by 3 heart
            stop