on first join:
    open chest with 1 row named "WYBIERZ KLASE" to player
    set player's current inventory's slot 0 to stone named "Frakcja droidow"  
    set player's current inventory's slot 1 to dirt named "Frakcja wojownikow" 
    
    
on inventory close:
    if name of current inventory of player is "WYBIERZ KLASE":
        cancel event
    
on inventory click:
    if name of current inventory of player is "WYBIERZ KLASE":
        if clicked slot is 0:
            cancel event
            execute console command "pex user %player% group set Droid"
            send "daj wiadomosc" to player
        if clicked slot is 1":
            cancel event
            execute console command "pex user %player% group set Wojownik"
            send "daj wiadomosc" to player