Once there was a monster called Pattern

Kittencat was telling stories on her way to sleep tonight.

Once there was a monster called Pattern. He tried to go for a little walk and it was very easy so he tried to go for a longer walk but it was too hard and then he died

She corrected herself, tried instead of died, but at that point I was laughing too much to remember more than the gist of the story. Pattern the monster does a bit more walking, and some running, and did the shopping and visited Grandma. Pattern's day sounds remarkably similar to Kittencat's. Save for the unfortunate incident after the long walk...