Of course, this is not the end of project, it's still in progress.
So, the objects that some of I got today are these. With [for~] sentence, The objects are generated and save automatically.
They are so cute. (^o^) The code is here.
I have a problem(it's not such big problem). In this code, I gather the faces to 'vertex group' that I'd like to extrude before operate each face. But if two faces selected alternately, the face between the two faces is selected, and three faces are extruded.