I wish I remembered which book I found this in, or I would list the title. This is a classical 7-circuit labyrinth on a tennis ball. Start with the seed pattern in the center. The second photo shows how you can measure out some of the lines horizontally so you can get the lines the same width apart. The last part of the seed pattern is the entrance, that ended up being a bit large. So I drew a daisy and arrow to show where to enter the labyrinth.