Answer:
What goes in the water red, and comes out black?
Hard to catch, easy to hold. Can't be seen, unless it's cold.
Used left or right, I get to travel over cobblestone or gravel. Used up, I vie for sweet success, used down, I cause men great duress.
What measures out time. Until in time all is smashed to it?
I can travel from there to here by disappearing, and here to there by reappearing.
I march before armies a thousand salute me. My fall can bring victory but no one would shoot me. The wind is my lover one-legged am I. Name me and see me at home in the sky.