You mean how the live demo is setup? Have you checked out your documentation file? There are soem pretty descriptive examples there on working with the homepage.
First, start by watching this video, if you haven’t already: https://vimeo.com/21047920
Then if you want to setup that section below the slider exactly how it is in the demo, see the section in your documentation:
Theme Overview > Default Homepage Written Overview > 6) Homepage Content
It was actually the content from a page feed into the homepage from the “Content From Page” option in building the homepage.