Imitate the poem If.

If I am a breeze, I hope the source of the wind is in the valley. If I am a tree, I would like to grow on the barren upper beam. If I am a well, I think it will be by the sea. If I am a dark cloud, I will run in the blue sky outside the cloud. If I am a river, I will not run. If I am a mountain, I will not hear even a cry. If I am a bird, I will not fly.