- Use controller's step for synchronization instead of internal step counter
- Rainbow pattern now syncs with controller timing like n_chase pattern
- Prevents rainbow from running independently and out of sync
- Uses beat_index % 256 for full color wheel cycling
- Replace oscillating behavior with proper chasing movement
- Use pattern_step for internal tracking instead of controller's step
- Calculate position relative to chase head: (i - pattern_step) % num_leds
- Chase head moves through all LED positions with n3 step multiplier
- n1 controls width of lit chase segment
- Process 't' field to distinguish between beat ('b') and update ('u') messages
- Beat messages: execute pattern immediately using current parameters
- Update messages: only update parameters, don't execute pattern
- Maintains backward compatibility with default to beat if 't' not specified
- Enables proper synchronization between controller and bars
- Changed alternating pattern to return delay/2 instead of delay
- Each phase now lasts delay/2, making full cycle equal to delay
- n1 now only controls ON/OFF segment width, not timing
radiate: origins every n1, step by delay, stop when full, dark wave outward, ensure strip off at end, run once
alternating: use n1 as ON width and n2 as OFF width; phase via self.step
pulse: attack (n1), hold (delay), decay (n2); stop at end
tests: add specto sweep (n1_sequence) and radiate demo; include n index per message; use nested {name:{...}} schema; support iterations/repeat-delay
