Nest Structure with Parakeet

Grasshopper
,
1

Hi everybody. I want to create a nest structure with parakeet. I found a tutorial but it was way to fast to follow can anybody help?
Artistic Rotation | Parametric House. → link to the tutorial

Bildschirmfoto 2021-04-27 um 20.26.18
Bildschirmfoto 2021-04-27 um 20.26.18896×1006 229 KB

Thank you!