Hi, I was following the video and somehow my Offset became red in grasshopper. I wonder if u can find the problem. Also, there was a special list of tools that was shown in the video, but I could not find it in my grasshopper. Is there anyway to download it?
Parametrics 
It is probably because one or more of the offsets fail – if you have a super small triangle and you offset by a large amount, GH doesn’t know what to do so it doesn’t offset that single problematic curve.
Try a smaller offset value or a less dense population of components, and see if you can get it to go grey again.