But they're dead easy with our GLO-416Y serial OLED.
Here's what I did: Using our custom-character editor, I made the vertical THE out of a pair of custom characters. Then I fired up Serial Sender and downloaded the bit patterns to the GLO. The instructions (as sent from Serial Sender's text box) looked like this:
(If that's Greek to you, check out the programmer's reference here.)
Now, I could print my sideways THE by placing the first custom character (ASCII 128 dec) on the line above the second (129). Now all I needed was a slogan to go with it. After some fiddling in Serial Sender, I came up with the mini-manifesto in the picture. The Sender string is like so:
In GLO control characters, that's clear the screen, set default font, print a custom char, carriage return, 'nuther custom char, increase font size, print OLED REVOLUTION, increase font size again, print @SEETRON.