Answer:
When it comes to me, you go on red and stop on green. What am I?
Send poorly behaved children to me and let them sit here. What am I?
I mean goodbye for South Americans.
You find me behind the stars; or in a sixth seventh or third. It takes something round a computer and me to make pie. I am bigger than anything you can think of.
When I am caught I am thrown away. When I escape you itch all day.
It flows out of the soil, It burns you if it boils, And holds us in its coils, More valuable than gold, As black as it is old.