Step Lane

One row of a step sequencer, with three states rather than two: off, on and accent, because accent is a real louder hit and a two-state lane forces it into a second row the player has to keep in sync by hand. Press to cycle, or press and drag to paint the value the first step took across the row. The playhead takes a fractional position, so a face animating from the audio clock draws a line that travels instead of a light that arrives after the step has already sounded. Layout, the press/drag reading, the paint rule and the `.`/`x`/`X` pattern notation sit in a pure core beside it.