What is Blue While Game? I want to know details about blue while game.

Blue While, Blue While, Blue While ! I have heard a lot about Blue While in news paper, social media, youtube  and news. I come to know from a news that many people are committed to suicide who are playing this game. What the matter.  How a game can kill people?   But I don't know about Blue While. Now I want to know details. What is Blue While Game? I want to know details about blue while game. Thanks.