From Gaudi Sagrada Familia columns
I've tried to reproduce the way Gaudi produced the columns for the Sagrada Familia in Barcelona, by rotating two star polygons. After one stage is produced, another one can be constructed from the resulting polygon.
Images from Sagrada Familia (Barcelona)
![Images from Sagrada Familia (Barcelona)](https://stage.geogebra.org/resource/tvrazh2p/tyb7SEWwMGpp8glU/material-tvrazh2p.png)
![Image](https://stage.geogebra.org/resource/gvk7u29p/Ke6Z1QJHis3rDFek/material-gvk7u29p.png)