Answer:
Walk on the living, they donβt even mumble. Walk on the dead, they mutter and grumble
I can be used to type and point you see. But don't forget, you can count on me. What am I?
Different lights do make me strange, thus into different sizes I will change.
Put into a pit, locked beneath a grate, guarded through the night, yet it still goes out.
You can see nothing else, When you look in my face, I will look you in the eye, And I will never lie.
Black we are and much admired. Many seek us if they are tired. We tire the horse, and comfort man, and turn White when we've fulfilled your plan.