More optimize

PLAN.md

@@ -11,7 +11,7 @@ This file records the original design brief and decisions so future contributors
 2. **Multi-show navigation** — all shows are compiled into the firmware. A single button lets you cycle through them:
    - 1 tap — next show
    - 2 taps — previous show
-   - Hold — reset to show 0 (slow blue pulse)
+   - Hold — reset to show 0 (blue breath)
 
 3. **Arduino + WS2812B** — runs on an Arduino Uno with a WS2812B (NeoPixel) LED strip.
 
@@ -56,7 +56,7 @@ Write/edit .txt files in converter/shows/
 
 ## Future ideas (not yet implemented)
 
-- Per-LED patterns (chase, sparkle, gradient segments)
+- Per-LED patterns — chase, sparkle (random white flashes over a base color), gradient segments. The `led_controller.cpp` pattern system already has the hook: add a `#define PATTERN_SPARKLE` in `config.h` and implement the branch in `leds_apply_color()`
 - Multiple strip support
 - Battery power optimization (auto-dim, sleep)
 - SD card loading (no recompile needed for new shows)