Compact and tileable red circuit blueprint.
Inputs, from left to right, are green circuits, copper, plastic, green circuits, copper, plastic. The copper inputs are a bit higher up and easy to miss.

Originally shared on the public FactorioPrints / Factorio School archive (factorioprints.com · factorio.school). Authorship preserved from the public catalog.
Compact and tileable red circuit blueprint.
Inputs, from left to right, are green circuits, copper, plastic, green circuits, copper, plastic. The copper inputs are a bit higher up and easy to miss.