Glad you liked it! This is my first serious attempt at "literate programming" style writing; it did take many attempts re-arranging the functions in logical order for the prose to make sense.

In my previous writeups such as http://g0v.asia/tw/ , I've followed SPJ's "writing a paper" guidelines ( HN: https://news.ycombinator.com/item?id=6989806 ) — almost to the letter — which was immensely helpful as well.