on right click on villager:
    if clicked entity's name is "sklep":
        open chest with 4 rows named "&2&lSklep" to player

        set player's current inventory's slot 0 to Black Stained Glass Pane named " "
        set player's current inventory's slot 1 to Black Stained Glass Pane named " "
        set player's current inventory's slot 2 to Black Stained Glass Pane named " "
        set player's current inventory's slot 3 to Black Stained Glass Pane named " "
        set player's current inventory's slot 4 to Black Stained Glass Pane named " "
        set player's current inventory's slot 5 to Black Stained Glass Pane named " "
        set player's current inventory's slot 6 to Black Stained Glass Pane named " "
        set player's current inventory's slot 7 to Black Stained Glass Pane named " "
        set player's current inventory's slot 8 to Black Stained Glass Pane named " "
    
        set player's current inventory's slot 10 to White Wool named "&f&lWelna"
    

on inventory click:
        if "%clicked slot%" is "10":
                close player's inventory
                send "Dziala"