Angels vs Demons

In a place where no people can live , where there is nothing but evil creature destroying the world of humanity , a light came up in no where and a capture the demons and send them to another planet , it's name was "Creptos" .
Ten years later , the earth was back to it's people , and the humans promise the light or what ever it was.... to keep there planet safe ,so they won't destroy it anymore . The light was happy so it faded into its planet again ... .
But humans couldn't keep there word , so after many years later they began to destroy there world again and again , animals started to die out , pollution seemed to appear again , and many bad things too .
Humans forget who saved them from there death , and the light was to them a fairytale story told by there grand parents .