Answer:
One by one we fall from heaven down into the depths of past, And our world is ever upturned so that yet some time we’ll last.
What's black when you get it, red when you use it, and white when you're all through with it?
If you have it, you want to share it. If you share it, you don't have it.
To unravel me you need a simple key, no key that was made by locksmith's hand. But a key that only I will understand.
Sleeping during the day, I hide away. Watchful through the night, I open at dawn's light. But only for the briefest time, do I shine. And then I hide away. And sleep through the day.
Why is the letter B always cool?