
Once upon a time, there were two friends, Bobby and Mark. They were playing chess outside in the park when Bobby suddenly noticed a bird flying in the air.
"Look at the bird," he said.
Mark looked up and waved at the bird as it flew away. "Bye bird," he said.
Bobby started to feel guilty. He had forgotten to wave goodbye to the bird.
Mark saw the look on Bobby's face and said, "It's okay Bobby, the bird is gone now. But next time, we should wave together."
Bobby smiled, and they went back to playing their game of chess.
