Autumn wind, cold weather, pieces of leaves falling from the branches.
Leaves fall to the ground, bugs crawl over, lie in it and use it as a house.
The leaves fell in the ditch, and the ants climbed over and sat on it, treating it as a boat.
The leaves fell into the river, and the little fish swam to hide under the tree and used it as a small umbrella.
The leaves fell in the yard, and the swallow saw them and said, "There is a letter, urging us to go to the south."