So all i did for this was find a drill bit that was the same thickness as christmas lights by testing them on a piece of wood, measured out a piece of plywood, and hand drew the letters on. Then I measured the lights to be every two inches and got to drilling :] I then put in the lights and taped the back with duct tape. Im gonna use this next week to ask someone to prom at my bonfire party. The wood isn't painted but it would look better in the daytime if it was, but it will be dark so thats less work for me. I spent about an hour from the idea to the finished product. I hope this inspires you to make your own, be creative!