I wrote this #elisp index generator a while ago. It's probably not the best way to do this, but there's something really neat about this little hack :p

https://media.emacs.ch/media_attachments/files/111/143/451/886/180/173/original/439d14691bb8cf21.png

https://media.emacs.ch/media_attachments/files/111/143/453/189/302/250/original/5a70d0a3839178e9.png