Expand with Multiple 4-Way Switches

What happens here

The instructor demonstrates that the 4-way switch system is scalable; you can add 'as many 4-ways as you want' in the middle of the circuit. The crucial point is to always ensure the circuit begins and ends with a 3-way switch ('the outer bun'). Each additional 4-way switch placed in the middle simply 'controls that lane of that highway,' meaning it redirects the flow of power through the traveler wires, allowing any switch in the series to turn the light on or off.

Goal: Understand the flexibility of adding multiple 4-way switches to a circuit for more control points.