Function badge 

pub fn badge() -> Program

A plate with a disc on its top, ready to colour or to pick on its own: the plate extruded from its sketch (plate), a circle sketched on the plane under it (mark), and the top divided along it (disc) into the disc, split_face(disc,extrude(plate,end),...), and the rest of the top, which keeps its name. The solid is as it was.