Answer:
Come up and let us go. Go down and here we stay.
Always old, sometimes new. Never sad, sometimes blue. Never empty, sometimes full. Never pushes, always pulls.
Thirty white horses on a red hill, First they champ, Then they stamp, Then they stand still.
It regulates our daily movements, but it feels no interest in our lives. It directs us when to come and go, but does not care if we pay attention. What is it?
My sides are firmly laced about, Yet nothing is withinΝΎ You'll think my head is strange indeed, Being nothing else but skin.
People take me on walks and I run and have fun. What am I?