Two teams of girls are on a field playing field hockey.    The game is stopped as a girl with a blue jersey grabs the ball in her  hand and puts it in play.   As the the girls chase the ball around at the other side of the field a whistle is blown and the game is on hold as the girls go their positions on the field.   The game starts again and girls are running to the other side of the field.   As they fight for the ball a whistle is blown and the game is stopped again.