Where is it? Find the tutorial here.
What is it? A tutorial that walks you through building a flask application that writes lyrics as output. Add a piece of the functionality one iteration at a time up until you have an MVP. The tutorial also includes a section with instructions on testing the application after each iteration.
What you need to follow? Prior programming experience using Markov chains is advantageous but you should be able to keep up even without it. You will also need the Python program installed on your computer.