A while back, I found this playground created by Mr. @Wingnut, I believe. - and it has driven me mad ever since. Done with just an array of 5 points - spectacular.
So, it drove me to see if I could create something with Blender - and continue on my slow learning process of the new version of Blender with all its idiosyncrasies**.
So here is my example using something from Blender and two lines of code I stole from Wingy’s example.
Now if I can just figure out the animation code he uses …
cheers, gryff
** With Blender, it used to be that selecting a row/ring of vertices used to be Alt + Click, but in Blender 2.81, it went to Double LClick, then in 2.82 it is back to Alt+Click. I go slowly mad
I am using 2.81a, and alt- left click selects edges when in edge edit mode. I am not often in vertex edit mode, but I just tried it & it works for me. Did you say you wanted ‘Legacy mouse stuff’?