To become a Lisper

For those holidays, I've been developping a tiny implementation of Lisp during daytimes and watching Star Wars during nights. To become a Jedi, you are required to be able to build your own light saver. In the same say, I realized, that to become a true Lisper you might as well be able to implemtent your own Lisp by yourself. So I try to become a true Lisper someday. May the lambda be with you :)