Answer:
The more you have me the less you see. Shine a light on me and I shall flee.
I am black and white. I have strings I have keys. I make sound without my lips. I make dough with no flour
What always goes to bed with its shoes on?
I move without wings between silken strings. I leave as you find my substance behind
I stand in one place yet I fill a whole room. I can be filled with molten rock and come in every hue.
Almost everyone needs it, asks for it, gives it. But almost nobody takes it.