My final design has a back board to protect the wall from shoe marks and direct, but you could mount these directly to the wall if you choose.
Step 1: Step One Grab some Wood And Mark it
I found some scrap wood that was 7" tall and ???" long, (There just so happened to be a lot of 7" tall pieces of wood laying around.
I then measured in 2" and marked up 22.5 Degrees.
I then marked the rest of the wood 6 more times accordingly, or you can make your first cut and use that piece as a template for the rest.