Answer:
What measures out time until in time all is smashed to it?
What gets closer when you blink?
This is in a realm of true and in a realm false, but you experience me as you turn and toss.
A harvest sown and reaped on the same day In an unplowed field, Which increases without growing, Remains whole though it is eaten Within and without, Is useless and yet The staple of nations.
Whilst I was engaged in sitting. I spied the dead carrying the living
People take me on walks and I run and have fun. What am I?