[DonHopkins]

Here's the elegant Snap! visual Y Combinator:

https://imgur.com/cOq8tvR

Visual Lambda: Note how the gray block after the "report", shrink-wrapped around the "call (fn) with inputs (fn) []", is a visual "lambda". It looks like a "gasket" or "baggie" that insulates the code inside from being immediately evaluated, returning a closure instead.