command /gm [<text>] [<player>]:
    trigger:
        if player has permission "gm1" or "gamemode.*":
            set {_gui} to chest inventory with 1 rows named "&9&lMENU GAMEMODE"
            set slot 1 of {_gui} to diamond sword named "&e&lSURVIVAL"
            set slot 3 of {_gui} to Brick named "&e&lCREATIVE"
            set slot 5 of {_gui} to Feather named "&e&lADVENTURE"
            set slot 7 of {_gui} to ender pearl named "&e&lSPECTATOR"
            open {_gui} to player
            if arg 1 is "0":
                if arg 2 is not set:
                    set player's gamemode to survival
                    send "&8» &7Zmieniles Tryb Na &eSurvival"
                else:
                    if player has permission "gm1" or "gamemode.*":
                        set arg 2's gamemode to survival
                        send "&8» &7Zmieniles Tryb na &eSurvival"
                    else:
                        send "&8» &cBrak Uprawnien."
            if arg 1 is "1":
                if arg 2 is not set:
                    set player's gamemode to creative
                    send "&8» &7Zmieniles Tryb na &eCreative"
                else:
                    if player has permission "gm1" or "gamemode.*":
                        set arg 2's gamemode to creative
                        send "&8» &7Zmieniles Tryb na &eCreative"
                    else:
                        send "&8» &cBrak Uprawnien."
            if arg 1 is "2":
                if arg 2 is not set:
                    set player's gamemode to adventure
                    send "&8» &7Zmieniles Tryb na &eAdventure"
                else:
                    if player has permission "gm4" or "adventure":
                        set arg 2's gamemode to adventure
                        send "&8» &7Zmieniles Tryb na &eAdventure"
                    else:
                        send "&8» &cBrak Uprawnien."
            if arg 1 is "3":
                if arg 2 is not set:
                    set player's gamemode to spectator
                    send "&8» &7Zmieniles Tryb na &eSpectator"
                else:
                    if player has permission "spectator" and "gm3":
                        set arg 2's gamemode to spectator 
                        send "&8» &7Zmieniles Tryb na &eSpectator"
                    else:
                        send "&8» &cBrak Uprawnien."

on inventory click:
    event-inventory is not player's inventory
    if name of event-inventory is "&9&lMENU GAMEMODE":
        cancel event
        if clicked slot is 1:
            execute player command "gm 0"
            stop
        if clicked slot is 3:
            execute player command "gm 1"
            stop
        if clicked slot is 5:
            execute player command "gm 2"
            stop
        if clicked slot is 7:
            execute player command "gm 3"
            stop