The letter “o” is actually a letter with small pixels. So you will need to actually create a drawing like;

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- -
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Where each “-” is actually a pixel.
Each module will have two inputs. One is spacing… Like where in the screen will the letter o be written on.
The second is a simple on off switch.
So let us write John.
First the “J” module will need to fire up and write;

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Finished in 8 pixels

Than quickly (by using the 25MHz clock) you will close the “J” module and get
where the “J” module ended(8 pixels). Than call “o” module with the option of module o_letter(… ,8)
That way the letter “o” will be create right after the “J”.
Doing this with the rest of the letters you will eventually get

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-- --- - - --
-- - - - - - - -
------ --- - - - -

This will happen because J,o,h and n will be shown very quickly. And to human eyes it will look like one word.

Couple of tips;
– First start out with something simple like a square.
– Than continue and empty the inside of the square
– Realize you have made your first letter “o”