Answer:
It can be used onstage or to express admiration. What is it?
I am the red tongue of the earth, that buries cities.
Come up and we go, Go down and we stay.
Often found in doctor's offices and pirate flags
They are Dark, and always on the run. without the sun, would be none!
If itβs information you seek, come and see me. If itβs pairs of letters you need, I have consecutively three. What am I?