competition between dark and light

locked up in a dark room so many
thinking that everything is visible though it's tiny
laughing happily and freely
never know the truth is screaming loudly

lack of light in their hearts
make them feel no fright
though anybody tries to give them bright
with some thoughts

Who will shine?
Who will fade?
They think everything will end in this world
but the competition results will be announced in the next world.