Answer:
It comes only before, it comes only after. Rises only in darkness, but rises only in light. It is always the same, but is yet always different.
Brown I am and much admired; many horses have I tried; tire a horse and worry a man; tell me this riddle if you can.
Being able to interpret the letters on this screen proves that you have this quality.
What has four wings but cannot fly and uses the wind but does not know why?
With head without hair. With mouth without tooth.
Black we are and much admired. Many seek us if they are tired. We tire the horse, and comfort man, and turn White when we've fulfilled your plan.