SPOILER: FIX DOPPLER UNIT–PUZZLE #21

As you can see I labeled each Column, there are 3 separate metal sheets the first column on the left has 4 switches, the middle column has 3 switches, and the last column on the right has 4 switches. The point of the game is to flip one switch for each column until all lights are blue. The following is the solution:

1.) Column 1, #1 Column 2, #2 Column 3, #1 Click round green button
2.) Column 1, #2 Column 2, #2 Column 3, #2 Click round green button
3.) Column 1, #3 Column 2, #3 Column 3, #4 Click round green button
4.) Column 1, #4 Column 2, #2 Column 3, #2 Click round green button