Ouroboros

Drag around the thick circular loop to play the morphing bank without starting the automatic clock. The triangle shows the current manual or play position, and recent hits leave brief fading flashes. The Play button starts or pauses automatic motion. Click the center while playing to reverse direction. Use Left and Right Arrow to move around the circular loop while paused, or to set falling and rising direction while playing. Use the direction controls or Up and Down Arrow to make perceived pitch rise or fall endlessly. Press Space or Enter to strike the selected position.