Casus Belli

All kinds of people are waiting in seven different queues. The first person of each queue becomes the last of the next one, thus creating an enormous human line. But at the end of the line, it all begins backwards again. All kinds of people are waiting in seven different queues. The first person of each queue becomes the last of the next one, thus creating an enormous human line. But at the end of the line, it all begins backwards again.