1. Prepare the 2-by-4s. Yes, you could buy a full, eight-foot 2-by-4 for this, but odds are you have some scrap pieces lying around from other projects. I’ve got so many I’m saving “just in case I can use them for something” that it’s almost embarrassing. You could also work with a single piece of wood, but this project is much easier if you start with two separate pieces. If you don’t have two, roughly cut a longer piece in half. Each piece should be a minimum of 16 inches long, just to make them easier to work with—they’ll eventually be cut down to nine inches each.