Answer:
No matter how little or how much you use me, you change me every month.
A harvest sown and reaped on the same day in an unplowed field. Which increases without growing, remains whole though it is eaten within and without. Is useless and yet the staple of nations.
Look into my face and I'm everybody. Scratch my back and I'm nobody.
Fatherless and motherless. Born without sin, roared when it came into the world. And never spoke again.
What has a spot and is very bright, is sometimes, red, white, blue, yellow or green and is often blinding.
I met a man and drew his name. He tipped his hat and played my game. What is his name?