Lights Out Mini-game

With sights now on a long-term adventure map, I've been creating mini-games to add inside. This is the first puzzle that I've been wanting to create for some time. This is by no means the final product.

Lights Out is a light-based puzzle using a 9 square grid of lights with an on and off state. When you toggle one light every adjacent light also toggles states, the end goal having turned on every light on the grid.
This mini-game only goes as far as 1 row of 7 lights, each light following the same principles. When every light is turned on, the game has been won. The provided world does not contain anything more than a proof of concept and a noteblock/redstone lamp to detect when a player has won.