How to fold a flat surface

Hi everyone,

I’m cofused with a thing, i have a flat surface, but i want to fold this surface without using rhino, only grasshopper, don’t know if this is possible, im think yes, but i dont know, somebody help me? because i need help.

For example: I have a flat paper, rigth? and i want to fold this paper, to that the nibs meet forming a big curve.

I wait for answers, thanks.