There once lived a rabbit and a dog. The rabbit was very jealous that the dog received more attention than he did. Then, one day, the rabbit got so jealous that he decided to tell lies to all of his friends. He cried, "The dog keeps trying to hurt me!" The dog got into lots of trouble. Then, everyday the rabbit kept telling tales about the dog. But one day the other rabbits noticed that the rabbit was telling fibs. A few days later the rabbit squealed again, "The dog is trying to hurt me!" This time the rabbit's friends ignored him. Later that day the other rabbits realized that the dog had seriously hurt their friend. 
Do not tell lies because one day you may be telling the truth and no one will believe you. 