I played it slowly. I feel changing of degrees of notes played by right
hand and by left hand is interferences of waves.
When I play it more rapidly, I think about how to use my fingers, hands,
arms, Tanden and my sacrum, shifting my weight from/to left, center and
right, and so on.
I feel that I make waves from below the keyboard, waves move forward, and
waves come back to my back since the ocean is one and the earth is circle
and go forward.
artwork
https://pixabay.com/photos/wave-ocean-sea-storm-tsunami-1913559/
https://pixabay.com/photos/heaven-clouds-cloud-shape-3335585/
