The web page you are currely looking at is a normal HTML file providing an entry point to the demonstration of this technology. It is the only such "real" web page involved throughout the entire demonstration. Every other page you will see and make use of is completely dynamic (generated "on the fly" based on parameters and text either in files, or supplied by you during the interactive portions).
In general, the bottom of each web page will provide a textual hyperlink to move to the next step in the demonstration.