how can i use it? with example images for each step

Hi.
how are you.
Your project is wonderful and interesting.
But I do not know how to use it.
Can you explain how it is used with images that explain each step, for the current version (https: ///29a.ch/2016/03/08/normalmap-javascript-lighting-effects) and the old version (https://29a.ch/2010) / 3/24 / normal-mapping-with-javascript-and-canvas-tag)
I want to use it with html