Build aospa for flex topic

I just pre ordered my g flex with T-mobile to replace my nexus 5. I want to build paranoid android for my g flex. I followed this http://www.elementalxdesigns.com/ecl...-Ubuntu-13-04& to get things set-up. I went all the way up until "Time to get Source"...Where do I go from here??? Also what will I need to get this going when I receive my phone?