Answer:
I have a small hill with seven holes.
When it comes to me, you go on red and stop on green. What am I?
You heard me before and then again. Afterward I die until you call me again.
I have roots nobody sees. I am taller than trees. Up up I go but I never grow.
you cannot keep me until you have given me
Give it food and it will live, give it water and it will die.