

Tim and Sam were friends who liked to play in the park. They had a plan to make a fort with sticks and leaves. They found a big stick and a red flag to put on top of their fort.
"Look, our fort is done!" Tim said. "We are the kings of the park!"
Sam nodded and waved the flag. "Yes, we are! No one can take our fort!"
But then they saw a big dog running towards them. The dog was filthy and had mud and dirt on its fur. It barked loudly and showed its teeth.
"Help! A dog!" Tim cried. "Run, Sam, run!"
They tried to run away, but the dog was faster. It jumped on their fort and knocked it down. It tore the flag with its mouth and shook it. It chased Tim and Sam and bit their legs.
"Ow! Ow! Ow!" Tim and Sam screamed. "Go away, dog! Go away!"
But the dog did not go away. It kept biting and barking. Tim and Sam were hurt and scared. They wished they had not made a fort in the park. They wished they had stayed home.
