technical description: Proximity sensors track the user that approaches
the screen. A serial message is then sent to the computer to trigger
the transformation of the wall image into live video feed. The user's
movement around the screen is detected by the sensors and sent via the
network to a micro-processor that is connected to the other screen.
The micro-processor sends pulses to the motor, and moves a camera on
the other side accordingly. The camera's position is constantly updated
to follow the user's movement.