Here's the vertical display!
(I do realize that this uses observers, which didn't exist when this topic was created)
(Also, this is a 10x20 screen, but you can do this with any screen size)
(Well, not any screen size, it's limited to (world height limit)÷2 by (world width limit)÷3, because it uses 2x3 units that are detected by observer chains, which all come together in the middle.)
Edit: Oh wait, this isn't a private message.