Once Upon the Time : The Snake and the Frog

I was walking down this river near the weather institut, hearing the voice of the frogs, and seeing them jumping successively in the water as I was drawing near them, as suddenly I saw a snake just catching a big frog, and the frog trying his best to escape, but I think we can't help it, or maybe the snake will die by starvation, that's life and nature is just a model.