I just make it up as I go along. Triangle body, Rectangle legs folded in half and sewed up. (You could do it on dpn, but I'm not good at those) Football shaped head. Triangle antenna with a circle tip. And I-cord arms!!
Really easy lol!!
There is a pattern out there:
But I kind of used it, then kind of did my own thing.
Hope that helps!!
I took pics of the last one I did . Maybe that will give you an idea