Some IDE editors will render code along the lines you propose, which is preferable, I think, over building it into the syntax.
Plankalkül is what you get when you ask a mathematician to design a programming language for a system that won't exist for decades. In particular it wasn't hampered by the need to imput data via a typewriter-like device.
Plankalkül looks like a mashup between APL, typesetting and visual programming. It could be interesting.