A 3D picture of Desargues' Theorem (Geogebra)

Recall that Desargues' theorem says that a pair of triangles that are in perspective from a point must also be in perspective from a line, and vice versa. Below is a picture of such a Desargues configuration, consisting of a pair of triangles $\Delta ABC$ and $\Delta DEF$, which are in perspective from both the point $O$ and the line through $X,Y$ and $Z$.

Click on the image.