Auxetic with kangaroo

Hi guys, I’m a beginner with Grasshopper + Kangaroo, and I’ve been trying for a week to recreate the form in these videos:
https://www.youtube.com/watch?v=fCPRE4Dp9ug
https://www.youtube.com/watch?v=XP5Fk-lHvK0&t=1s

I’ve watched many tutorials, but I still can’t get the same behaviour. I’m asking for a step-by-step starting point. Please help me out.