[Skrypt] Magiczna perła

Skrypt po wejściu na serwer daje magiczną perłę, która po rzuceniu wraca 

on join:
    set slot 0 of player to ender pearl named "&eMagiczna Perla"
on rightclick with ender pearl:
    if name of player's tool is "&eMagiczna Perla":
        if player don't have permission "perla.vip":
            cancel event
            send "&cMusisz kupic range VIP, aby uzyc perly!"
on projectile hit:
    if projectile is a ender pearl named "&eMagiczna Perla":
        set slot 0 of shooter to ender pearl named "&eMagiczna Perla"