on load:
createCooldown("perla", 3 seconds)
on rightclick holding an ender pearl:
if getCooldown(player, "perla") is true:
setCooldown(player, "perla")
stop
cancel event
send "&7Perle mozesz uzyc za: &a%getCooldownText(player, ""perla"")%"
https://skript.pl/temat/34625-axcooldown-zarządzanie-cooldownem/