What the computers saw to adjust the interactivity levels. the blue outlines and white dots registering of movement. Each time movement registers, the counter resets to zero. After 30 seconds without movement on two sides or 60 seconds on one side, the computer triggers a different batch of video to try and encourage the viewers to move around more.
Though it never happened in the performance, if there was no movement for 180 seconds there is ‘screen saver’ where all the screens turn to a fish tank.