function change(p: player, i: item, b: item, t: text):
    close {_p}'s inventory
    set {_i} to "%{_i}%" parsed as item
    set {_b} to "%{_b}%" parsed as item
    set {_loop} to 0
    while {_p} has 9 of {_i}:
        remove 9 of {_i} from {_p}
        add 1 {_b} to {_p}
        add 1 to {_loop}
    send "&aWymieniłeś %9*{_loop}% &7%{_t} &ana %{_loop}% bloków." to {_p}

command /bloki [<text>]:
    trigger:
        if player has permission "sk.bloki":
            close player's inventory
            open chest with 4 rows named "&8Zamiana na bloki" to player
            wait 2 tick
            loop 36 times:
                set player's current inventory's slot loop-number - 1 to gray glass pane
            set player's current inventory's slot 10 to iron block named "&7&lZelazo" with lore "", "&eKliknij, aby zamienic.", ""
            set player's current inventory's slot 12 to gold block named "&6&lZloto" with lore "", "&eKliknij, aby zamienic.", ""
            set player's current inventory's slot 14 to emerald block named "&a&lEmerald" with lore "", "&eKliknij, aby zamienic.", ""
            set player's current inventory's slot 16 to diamond block named "&b&lDiament" with lore "", "&eKliknij, aby zamienic.", ""

on inventory click:
    if inventory name of current inventory of player is "&8Zamiana na bloki":
        cancel event
        if clicked slot is 10:
            change(player, iron ingots, iron block, "żelaza")
        if clicked slot is 12:
            change(player, gold ingots, gold block, "złota")
        if clicked slot is 14:
            change(player, emeralds, emerald block, "emeraldów")
        if clicked slot is 16:
            change(player, diamonds, diamond block, "diamentów")