// I AM NOT DONE

    // TODO: implement the message variant types based on their usage below

    ChangeColor((u8, u8, u8)),
    Echo(String),
    Move(Point),
    Quit

        // TODO: create a match expression to process the different message variants

        match message {
            Message::ChangeColor(rgb) => self.change_color(rgb),
            Message::Echo(string) => self.echo(string),
            Message::Move(point) => self.move_position(point),
            Message::Quit => self.quit(),
        }

// I AM NOT DONE

    // TODO: define the different variants used below

    Move { x: usize, y: usize },
    Echo(String),
    ChangeColor(usize, usize, usize),
    Quit

// I AM NOT DONE

    // TODO: define a few types of messages as used below

    Quit,
    Echo,
    Move,
    ChangeColor