There once was a little girl named Mary who loved to copy everything she saw. If someone smiled, she would smile. If someone waved, she would wave. And if someone danced, she would dance. But one day, she saw something she didn't want to copy. Her father was yelling at her mother. Mary was so upset that she ran to her room and slammed the door. "Why would anyone want to copy such a horrible thing?" she thought. Then she realized something: there was no need to copy everything she saw. Mary decided that from that day on, she would only copy the good things she saw. She would smile at people, and wave to them, and dance when she felt like it. And soon, everyone around her was doing the same. The more she copied the good things, the more good things she saw. And before long, the whole town was filled with happiness. All because of one little girl who decided to copy the good, instead of the bad.