Answer:
Take one out and scratch my head, I am now black but once was red.
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.
I crawl on the earth. And rise on a pillar.
Tall in the morning, short at noon, gone at night. But I'll be back soon.
What is it that given one, you’ll have either two or none?
If it’s information you seek, come and see me. If it’s pairs of letters you need, I have consecutively three. What am I?