Command:
    type: command
    name: GUI
    description: Opens the server selector
    usage: /server
    script:
    - narrate "You have opened the server selector" 
GUIMenu:
    type: inventory
    title: Server Selector
    size: 36
    slots:
    - "[] [] [] [] [] [] [] [] []"
    - "[] [] [] [] [] [] [] [] []"
    - "[] [] [] [] [] [] [] [] []"
    - "[] [] [] [] [] [] [] [] []"

Menu1:
    type: item
    material grass:
    display name: Survival

Handler:
    type: world
    events:
        on player chats:
        - inventory open d:in@GUIMenu