Answer:
Always old, sometimes new. Never sad, sometimes blue. Never empty, sometimes full. Never pushes, always pulls.
I march before armies, a thousand salute me. My fall can bring victory, but no one would shoot me. The wind is my lover, one-Βlegged am I. Name me and see me at home in the sky.
What goes around the world and stays in a corner?
By Moon or by Sun, I shall be found. Yet I am undone, if there's no light around
What has four wings but cannot fly and uses the wind but does not know why?
People take me on walks and I run and have fun. What am I?