function repair(p: player):
    if {_p)'s lvl is greater than 29:
        repair {_p}'s tool
        set {_p}'s lvl to ({_p}'s lvl - 30)
        send "&aNaprawiles przedmiot!" to {_p}
    else:
        send "&cMasz za maly poziom exp. Wymagany 30!" to {_p}

on right click on anvil:
    cancel event
    open chest with 1 rows named "&eKowadlo:" to player
    set player's current inventory's slot 5 to anvil named "&eKliknij i napraw!" with lore "&7Koszt: &e30 poziom exp.||&7Przedmiot: &e%player's tool%"

on inventory click:
   if inventory name of current inventory of player is "&eKowadlo:":
        if clicked slot is 5: 
            repair(player)