Travelling water
Rain falls from the sky. It lands on top of a mountain. The rain-water gathers and makes a stream.
The stream-water goes down the mountains top and while it goes down more water joins eighter
from the soil or more rain-water or anywhere else. And the more water makes a river. Then more
and more water comes while the river comes down the mountain. When it finally comes all the way
down the mountain it would become a sea. Witch will sooner or later will become an Ocean by
more water.