Hello Isbah, yes this lesson was made with the previous version of Kangaroo it should still be available on the Food4 Rhino page. Kangaroo 2 removed and simplified some of the components, not for the better in some cases. The planarize component now takes a mesh instead of a collection of vertices to work. Here is a link where Daniel Explains how you can use the new Planarize component to planarize with vertices http://www.grasshopper3d.com/group/kangaroo/forum/topics/k2-planarize-any-polygon it takes a bit of coding but it is pretty straight forward hope it helps. I´ll try to do an update of this lesson as soon as possible with the new components. Cheers!