See the source code at
http://fexl.com/code/ .
The README file in the src directory gives simple instructions for
build
and install. In the test directory you'll see a "try.fxl" file which
I've been using to test various things along the way.
This is a serious programming language. A lot of thought has gone
into this code. After this, I'll be focusing on adding more
extensions and libraries.