I call it Build Helper and it makes all idle builders help nearby factories (inspired by KAIK

Anyway, I attached version 0.3 and if anyone has any comments or there is a similar script, please post!
(New features that could be added:
- idle builders help building buildings
- balancing, right now if two factories are close to each other all builders often only works at one of them)
edit.
Removed spaces from name so it shows up in f11 menu