Boundless Wave
The GPU wave-equation solver every water demo uses for realism, pointed at its opposite: a boundless standing-wave field with no object, no centre, no scale — the formless-jhāna sphere of infinite space, shaped only by the loudness of your breath.
Sound and microphone start on this click (browsers block autoplay). Breathe slowly, long and full, toward the mic — or just watch: with no mic the field breathes on its own.