This turns out to be a simple design. The only real obstacle is making sure there’s room for the numbers.

Here’s an easy way to draw the tablets:

Start by drawing a square. Try to make it large enough that you can easily split it into 9ths — make the square 9 by 9 on a grid for example. | |

Split the square vertically into three rectangles by outlining the middle 9th. Or to put it another way, make the rectangles 4/9ths, 1/9th, and 4/9ths. | |

Draw a horizontal line 2/9ths from the top. | |

Place marks on the top side of the square on the center of each of the larger rectangles. | |

Use arcs to connect those marks to the places where the horizontal line touches the rectangles. | |

Now that the overall design of the tablets is done, here’s how to easily position the numbers. Draw a line vertically through both tablet’s middle. These lines show where the center of the tablet is, and so you can position the numbers easier. | |

Now divide the rectangular potion of each tablet into 9ths. Each of the lower 8 sections will contain a different number. | |

There’s no right or wrong about how the numbers are arranged. Just be sure to use the lines drawn in the last two steps to guide you in adding them. |