Answer:
I go around in circles, but always straight ahead. Never complain, no matter where I am led.
Always old, sometimes new. Never sad, sometimes blue. Never empty, sometimes full. Never pushes, always pulls.
The more holes you cover the lower it goes.
I usually wear a yellow coat. I usually have a dark head. I make marks wherever I go.
You can hold it without using your hands or your arms. What is it?
If lightning strikes an orchestra who is the one most likely to get hit?