Yeah, the OP should have numbered them 10, 20, 30, and 40, so the GP could insert a needed line in between...

I edited my post. Go wild!

Man, this is triggering more memories of programming in Basic. I remember writing programs in BASIC (as a kid/teen, mind you) where I didn't plan enough for changes and had to renumber swaths of code to allow more functionality. I was so happy to learn Pascal.