An interesting device, if it can be called so invented. He knows how to "stop" time.
The principle of action is: from top to bottom (which is not surprising) water is constantly dripping. All this intermittent stream is illuminated along the entire length with the help of two again vertical paths of LEDs. The tracks blink strictly synchronized with each drop.
The interest is that playing by shifting the phase of the flashing tracks, you can somehow stop time, freeze drops in the air and even make them fly upwards. ')
Of course, this is just an optical illusion, but it looks great.