Drop your scheme4.png (1024x1024) in this folder, next to this file, as:

  graphics/schematics/scheme4.png

Same setup as scheme1.png: the entity is already sized to scale the
1024x1024 source down to fit a 12x12 tile footprint automatically.

Craftable via the same recipe as scheme1 (wood + green circuit + copper
wire), unlocked on the SIDEQUEST branch of the research tree (the one
that starts at "Q.3$T1_ified.[%8%SIDEQUESTERZ]") rather than the main
chain -- see prototypes/technologies.lua if you want to move it.
