Answer:
They are many and one, they wave and they drum, Used to cover a state, they go with you everywhere.
I can move even when you are still. I can be one or many.
High born, my touch is gentle. Purest white is my lace. Silence is my kingdom. Green is the color of my death.
Tall in the morning, short at noon, gone at night. But I'll be back soon.
What can be underwater, under fire, on fire and taking water all at the same time?
Almost everyone needs it, asks for it, gives it. But almost nobody takes it.