Move from CoffeeScript to ES6, the beginning

I’m working on a book that shows how we can integrate canvas into our daily web design and application. I converted that book into AsciiDocrecently. Now I’m making another chanegs to the code example. I start converting the source code from CoffeeScript into ES6. You can find the progress of converting my example code in my CodePen collection.

By the way, A good book to learn ES6: You Don’t Know JS: ES6 & Beyond