Children of the Dark Game

This book is set in a busy city, where people are busy with their everyday lives and taking their days as it comes. Until one day when Wendy; a 15 year old girl, went outside her little complex house house, complete darkness surround.
The only people left are teenagers who don't know what's going on.

Days turning into weeks which turns in to months go by with a lot of scariness and confusion...Will things get better or will it be a living hell?