It sounds like you're talking about clearing the screen with spaces. Note that you don't have to: ordinary newlines work just fine. And then you only have to worry about the screen's height, not its width as well.
In my case it was filling the screen so as to create an image.
It is too clear and so it is hard to see.
A dunce once searched for fire with a lighted lantern.
Had he known what fire was,
He could have cooked his rice much sooner.