From the Super Mario Wiki
In this microgame, the player controls a dog. This dog is chained to a peg, which is the center of what is going to be a circle. The dog needs to walk on the blank spots, which magically draws it. Once the circle is complete, the peg and the dog's chain disappear and the circle now has the dog's face in it. Both the dog and the circle grin at the player.
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