command /sklep [<text>]:
    trigger:
        set {_s} to chest inventory with 3 rows named "&cSklep"
        set slot 12 of {_s} to red wool named "&cSprzedaj"
        set slot 14 of {_s} to lime wool named "&aKup"
        open {_s} to player

on inventory click:
    if name of event-inventory is "&cSklep":
        cancel event
        if clicked slot is 12:
            set {_ss} to chest inventory with 3 rows named "&cSprzedaj"
            set slot (integers between 0 and 25) of {_ss} to red stained glass pane named "&7"
            open {_ss} to player
        if clicked slot is 12:
            set {_sk} to chest inventory with 3 rows named "&aKup"
            set slot (integers between 0 and 25) {_sk} to lime stained glass pane named "&7"
            open {_sk} to player
    if name of event-inventory is "&cSprzedaj":
        cancel event
    if name of event-inventory is "&aKup":
        cancel event