command /gui [<number>]:
    trigger:
        if arg 1 isn't set:
            execute player command "gui 1"
            stop
        if arg 1 is "1":
            wait 1 tick
            open chest with 1 row named "MENU&7 (1/2)" to player
        if arg 1 is "2":
            wait 1 tick
            open chest with 1 row named "MENU&7 (2/2)" to player