Next, I wanted to add a similar design with the baseboards to the wall behind the bench, because I wanted to make it look more like a built-in piece.
I put a 1X4 MDF board right against the wall and the bench.
Then, I put five 1X3 MDF boards going vertical on the wall and to top it off, I put a 1X4 MDF board on the top.
Add a 1X2 board to the top of the 1X4.