Begin Robotics is a four week Massive Open Online Course which runs on the FutureLearn platform. One of its novel features is its use of interactive HTML5 web pages for the exercises and to demonstrate key principles. This page provides access to those web pages.
The pages require that you have a web browser which supports the canvas (such as Firefox, Chrome and modern versions of Internet Explorer), and have javascript enabled.
Click on the appropriate link and see the file.
Enjoy - and any feedback appreciated