command /sklep [<text>]:
    trigger:
        open chest with 1 row named "SKLEP" to player
        set player's current inventory's slot 0 to diamond sword named "&7- &6CENA: &e&l450&2&l$"
        stop
        
on inventory click:
    if inventory name of current inventory of player is "SKLEP":
        if clicked slot is 0:
            cancel event
            if {kupno::diamentowy::miecz::%player%} is true:
                if player's balance is smaller than 450:
                    send "&7>> &cTwoj stan konta jest mniejszy niz 450!"
                else:
                    remove 450 from player's balance
                    send "&7KUPILES DIAMENTOWY MIECZ!"
                    set {kupno::diamentowy::miecz::%player%} to false
            else:
                send "&7>> &cJuz kupiles ten przedmiot!"