square the game

First, square the game. It said that the game is even more horrible than the Die Xian.
game is so fun, the election four individuals. In the middle of the night hours, in a rectangular blank room, will exterminate all the lights, and then in the room four corner, each corner point of a person, and then facing the corner, it is best not to look back. The game starts, one of the corner of one corner to another person who walked gently slap the person in front of the shoulder. Then, the person who was shot in the same way one corner to another walk (which we take the same direction, are both clockwise or counterclockwise), and then beat No. 3 person on the shoulder. And so on, but if no one when you come to a corner, we must first cough, and then across the corner and continue to move forward until the next person to see. After a period of time, you will find, there will be no time when people cough, they say that every corner there are people, but there is always a person walking. Who is that so many out of it?