[predakanga]

Small correction for the author:

> Copper stays copper, unless there are one or two electron heads in any cardinal direction, in which case it becomes an electron head

should be

> Copper stays copper, unless there are one or two electron heads in any neighboring cell, in which case it becomes an electron head

I spent ages trying to figure out how the generators were working in their example before I looked up the rules elsewhere.

[paroneayea]

Thank you! I updated the post!