The direction is also indicated by the chime sound, which only blind people and YouTube viewers seem to know. As for button pressing: https://en.wikipedia.org/

The direction is also indicated by the chime sound, which only blind people and YouTube viewers seem to know. As for button pressing: https://en.wikipedia.org/wiki/Cargo_cult#As_a_metaphor https://en.wikipedia.org/wiki/Cargo_cult#As_a_metaphor