Cool. I have been working through the lessons in Nathan's University (http://nathansuniversity.com/ http://nathansuniversity.com/) which take you writing a Lisp

Cool. I have been working through the lessons in Nathan's University (http://nathansuniversity.com/ http://nathansuniversity.com/) which take you writing a Lisp interpreter (though admittedly with less rigor than this project) in Javascript. Definitely recommended if you want a starting point for something similar and don't know where to begin.