Kangaroo - Live Area Analysis

Hello, I should begin by adding the preamble that this question may somewhat be novice in nature, but after watching this video : https://vimeo.com/110105799 on Kangraoo, I was highly intrigued as to how they managed to get LIVE representation of area and moved area around using control points. Can anyone share with me a tutorial to do this? Please see 1:16 mark for what I am referring to. I should apologize in advance for any dumb questions following this post as I am new to the software.