Install a set of four way switches to control a light/device - electricity.straw.four PEP BB

This is a badge bit (BB) that is part of the PEP curriculum.  Completing this BB is part of getting the straw badge in Electricity.

In this Badge Bit, you will install a four way light switch set.  That's where three switches control the same light, say all around a central living room.  They're a bit complicated and simple all at the same time.  Let's try it!

Here's a video of a guy with a cool beard showing how they work:


To complete this BB, the minimum requirements are:
  - install three 4 way switches to control a light, outlet or device
  - you can upgrade an existing switch to a 4 way arrangement to get this BB

To show you've completed this Badge Bit, provide proof of the following as pics or video (less than two minutes):
  - the location before you start the job
  - the wiring underway
  - a view of each switch wired up
  - the installation done showing the light operating with each switch operating it