Making a cross stitch for a programmer. I want to put code on it. What should I write?

So I have a boyfriend who knows a few programming languages and I wanted to cross stitch a decorative pillow to make it look like a computer screen with some code on it. I have very limited programming knowledge, but I know a little bit of Java (if statements, if then, while loops, ect.). I want to have some kind of message or something in the code but I'm not really sure what to do. Any advice? Suggestions?