You can not fool all the people all the time

A boy used to tend his sheep in a jungle. The jungle was quite close to a village. The boy thought of making fun of the villagers. Once he climbed a tree and started shouting for help, crying wolf, wolf. 
when the villagers came to help the boy, they saw there was no wolf. The boy laughed at the villagers because he had fooled them

The boy did the same thing a second time, the villagers came again for his help. when the villager saw there no wolf, they decided not to pay attention to his calls for help. The boy, however, laughed at the villagers and enjoy fooling them. 
One day a wolf came into reality. The boy was so afraid, he called for help, crying wolf, wolf, This time no one came for his help. The wolf killed the boy and tore him into pieces and ate his flesh. It is no use fooling others and laughing at others. The boy had a horrible end because of fooling others and laughing at others.