I found an old piece of scrap wood. I think it may have been a sign in a former life because the corners were already rounded.
I tried using spray paint but the wood was so old it just sucked it up and you could not tell I had painted at all. So I used a couple of layers of exterior paint as a primer then spray painted white. I would have liked to have left it distressed looking but the whole time I kept thinking how much paint I would need to use so my husband would realize it was suppose to look the way it does and not throw it out. He does not appreciate rust and chipped paint like I do.
Using a craft ruler apply tape to mark stripes. This was a tad tricky because the board was 21 1/2 inches tall. I needed 13 stripes and the taped was 1.41 inches wide. Way too much math! Reminds me of one of my dad's riddles.