From the truly complex:
I decided to try one of my own. Most of my looked like a third grader did it (and I sincerely apologize to third graders everywhere.) I started to research and found out many people use a bistro chalk marker like this:
That solved some problems, but it did not solve them all. I improved to about the level of a fifth grader. I still erased about about fifty times and had a definite downward slope. I then decided to do the old pencil on the back transfer trick.
I created a template on Publisher that I
liked thought I could do. I printed it off and then took a pencil and covered the back with solid scribbles with a pencil. I then placed the paper with pencil side down on my chalkboard and traced over my design. I then a had a very faint line to follow with my chalk board. Here is my finished product:
Not too bad. I only erased three times and it lasted all season so I consider it a success.
However, if you think even this is too much work, stayed tuned, I have a really neat cheat for you.