2x2 grid, do this for 4 famous scientists [MATERIAL_ENGINE] Variable A: green circuit boards, copper traces, microchips, solder points, LEDs, wires, and tiny electronic components Variable B: $ input [PHYSICS_RULES] 1. No plastic toy base. No painted model. 2. The entire Variable B figure must be constructed only from circuit board fragments and electronic components. 3. Copper traces must follow muscles, body and facial details. 4. Scale: macro photography. We must see solder blobs, scratched chips, dust, tiny wires, LED glow, and sharp PCB edges. [LIGHTING] Harsh cybernetic side-lighting, deep shadows, faint LED accents, black tech-lab background.