After a long time working in my spare time on this, I finally finished my first tutorial, "Hello World" for Blender-Sverchok, a Free and Open Source visual programming tool similar to Rhino-Grasshopper used for parametric and generative design.
https://www.victorcalixto.xyz/tutorials/hellosverchok/hellosverchok
Also, I am working on a series of five tutorials of classical Grasshopper definitions translated to Sverchok that I will release soon.
Architect, Computational Designer, Transhumanist, and Free Software Enthusiast