on load:
createCooldown("lever", 5 second)
on right click:
if clicked block is lever:
if getCooldown(player, "lever"):
setCooldown(player, "lever")
stop
else:
send "&7Nastepnym razem mozesz uzyc dzwigni za: &6%getCooldownText(player, ""lever"")%"
https://skript.pl/temat/34625-axcooldown-zarządzanie-cooldownem/