I’ve uploaded another screencast to YouTube. This screencast builds upon the previous one so you’ll want to be sure to check it out first.
In this screencast I walk you through all of the code from the previous one and then proceed to add a new scenario that specifies a requirement for the checkout screen. Along the way I realize I have some code that needs to be reused on other pages. I then extract this code into a module and demonstrate how to create reusable “panels” that can be included in any page.