They found a pile of hay and some stones. They put one stone on the hay and beat it hard with another stone. After a while, a string of sparks came out. They felt very warm.After a while, go to the seaside to catch fish, then put fish on the fire and bake it constantly. After a while, it sends out a wave of fish fragrance. In this way, on this uninhabited desert island, I am hungry to catch fish to eat; I am thirsty to find water to drink and wild fruits to quench my thirst; I am cold to make a fire to keep warm. But they have to find a way home.After five days, at last a ship came to the desert island. They were so happy that they were finally saved.