This might be a stupid question, but is there a kind of "modern" line editor, maybe with jump-to functionality, that would only show me one line of code at a ti

This might be a stupid question, but is there a kind of "modern" line editor, maybe with jump-to functionality, that would only show me one line of code at a time? I wonder if programming like that would force an improvement in my code: kind of like programming through a keyhole, rather than the information overload of 20 documents open simultaneously. Maybe an Emacs mode with Intellisense, that only showed a line at a time, with syntax highlighting?