How do I feed in a mesh or something and it outputs an algorithmically generated slat furniture? This simple example would make things usable.
From there I think you could experiment with different widths, heights and depths and eventually come away able to build a slat-based piece of furniture with a text editor.
I don't think I could write something from the ground up in this language without a lot of work, but on the other hand I've seen people using CAD programs and the goofiness that happens when, for instance, they have a few hidden points they didn't know about. This format avoids all that pretty nicely.