Pattern coin

So imagine you have a piece of clay that you can shape into whatever you want, like a cookie cutter. Now imagine making many different shapes with this clay, like stars, circles, and triangles. These shapes can be used to make coins that are not meant to be used as money, but to show people what the real money will look like. These are called pattern coins! It's like a sneak peek of what the coin will look like before it's actually made.