It might be more reflective of the intensity of your coding if you could have it go by depth in a syntactic construct; e.g. for Lisp, number of currently open p

It might be more reflective of the intensity of your coding if you could have it go by depth in a syntactic construct; e.g. for Lisp, number of currently open parentheses. In fact, I now want to implement this — for Emacs, naturally.