What am I?

When it comes to me, you go on red and stops on green. What am I?

I am something all men have but all men deny. Man created me but no man can hold me. What am I?

I am an instrument capable of making numerous sound but cannot be touched or seen. What am I?

I am everyone, yet no-one, I can be anywhere or nowhere, when the lights go out I disappear and when I face myself we multiply. What am I?

Riddles and Answers