Answer:
Two little holes in the side of a hill. Just as you come to the cherry-red mill.
A slow, solemn square-dance of warriors feinting. One by one they fall, warriors fainting, thirty-two on sixty-four.
I have four legs but no tail. Usually I am heard only at night.
They're up near the sky, on something very tall. Sometimes they die, only then do they fall.
I'm full of holes, yet I'm full of water.
It is something you make after you've weighed your options.