What is the plaintext format stamps use? I'd like to try and write a stamp creation program. With image plotting. Not for JoJoBond-style upvoteness. I'd like to experiment with it etc. My stamp looks kinda like this(Sublime Text is my text editor(this is my praise for the best text editor since notepad)):
What do any of these characters represent on the stamp? I'd like any ideas or anything. I know that NUL or \0 or %00 represents the end of a string in C. The stamp itself is this: