Answer:
You can draw me, fire me or fill me in.
It is in every mountain, it's not in any hill, it's not in all the world, and yet it's in the mill.
What is born on the ground but floats to the sky, to be returned back again from the clouds up high?
This is the main ingredient in spaghetti and Mac-ยญN-ยญCheese.
In many hallways you would stand, if not with this in hand.
I never sleep yet sometimes I weep. I can get angry or just be happy. Wherever you go, I will follow. No matter what you do, I will be there. I cannot die. What am I?