totally do not understand what this should do. please give some intro...

I guess I need to rethink the whole layout. Under 'tips' there is a small explanation but might still be confusing. There's also a 'see an example' on the bottom, but I guess it's not that helpful either. Someone gave me a nice hint of doing a landing page with explanation and a huge 'start coding' button. I'll do that :)

You have to come down to the source of the problem, trying to solve problems, not symptoms.

Also please stop reinventing over and over again things that are already perfectly done - use Erlang or at least reimplement ruby as erlang, then it will be fine.

Oh, somebody did this already... http://elixir-lang.org/

Except this doesn't help a large (compared to erlang) real world user base of Ruby and Rails.