A LISP, complete with anonymous functions, implemented in entirely using pure SASS!
At the moment this is a very naive LISP, but it does have anonymous functions (which SASS lacks), those anonymous functions do act as closures, you have local and global variables, a tiny standard library, AND you can call any SASS functions from the LISP!
I will be extending it in the future so you can write LISP that returns CSS instead of only being able to return values.
Note: this is not a serious library. It was not intended for production use, only as a joke and to prove it can be done. If you do use it, let me know!