I often think about the concept of no-code, and how you're basically just moving complicated and very-much coded prefabs around that someone else made, this is a form of no-code, there isn't any way to actually input any code, really, but the computer has a single instruction(OISC) which is to replace the LHS of a rule with its RHS.
It allows for all sorts of funky GUI projects to be created without any code.
* This fantastic calculator program is an original creation of @capital!

