Answer:
I turn around once. What is out will not get in. I turn around again. What is in will not get out.
The more you have me the less you see. Shine a light on me and I shall flee.
I mirror your actions.
I always go to bed with my shoes on. What am I?
The higher I climb, the hotter I engage. I cannot escape my crystal cage. What am I?
The warmer I am the fresher I am.