Answer:
At first, I am nothing. Add something to negate. Add again to oppose. Add again to find the time to draw. Add once more to find nobody at all.
I am the yellow hem of the sea's blue skirt.
Come up and let us go. Go down and here we stay.
What flies without wings? What passes all things? What mends all sorrow? What brings the morrow?
Though blind as well, can lead the blind well.
They are many and one, they wave and they drum, Used to cover a state, they go with you everywhere.