Hello,
I recently revisited the elevators application, and decided to work on updating it to match the current Erlang version.
The updated version is on the fork at https://github.com/fredyouhanaie/elevators/ on the update-1 branch. Details of the update are at the top of the README file.
I would like to send a PR, if that is acceptable. The PR will contain a tidier README.
Currently there is no graphics, which I might work on in a month or so, unless someone else has a go :)