command /zmiana [<text>]:
    trigger:
        if target block is Monster Spawner:
            if arg 1 is not set:
                wait 5 ticks
                open virtual chest with 1 rows named "&6&lSPAWNERY" to player
                format gui slot 8 times of player with Lime Stained Glass Pane named " "
                format gui slot 0 of player with Lime Stained Glass Pane named " "
                format gui slot 4 of player with Spawn Cow named "&5&lKrowa" to close then run player command "/zmiana krowa"
                format gui slot 7 of player with Spawn Pig named "&5&lSwinia" to close then run player command "/zmiana swinia"
            if arg 1 is "krowa":
                if player has permission "spawner.krowa":
                    if player's balance >= 1000:
                        execute player command "spawner cow"
                        remove 1000 from player's balance
                        send "&9Pomyslnie zmieniono spawner"
                    else:
                        send "Nie masz tyle $$"
                else:
                    send "&cBrak uprawnień"
            if arg 1 is "swinia":
                if player has permission "spawner.krowa":
                    if player's balance >= 1000:
                        execute player command "spawner pig"
                        remove 1000 from player's balance
                        send "&9Pomyslnie zmieniono spawner"
                    else:
                        send "Nie masz tyle $$"
                else:
                    send "&cBrak uprawnień"
        else:
            send "&6&lTo nie jest spawner"