Wall e cubetto has a randomizer that picks a triangle or a square and prints this on the screen and the user must choose this pushbutton that the screen referred to then the user will set the directions on a controller then the device will work
or the user can control it with his mobile phone
HOW THE RANOMIZER WORKS
TURNING LEFT
RUTNING RIGHT
MOVING FORWARD THEN TURNING LEFT
TURNING AROUND
AVOIDING HITTING THE WALL
CONTROLING IT WITH ANDROIF DEVICE