Restore full color cycle in animation, keep faster delays

src/led_stub.cpp

@@ -198,7 +198,7 @@ void DefaultLedStub::begin() {
 
     // Launchpad X style: sweep each LED through palette, then all-off
     for (int i = 0; i < NUM_LEDS; i++) {
-        for (int c = 1; c <= 127; c += 16) {
+    for (int c = 1; c <= 127; c += 4) {
             uint32_t color = launchpad_palette[c];
             uint8_t r = (color >> 16) & 0xFF;
             uint8_t g = (color >> 8) & 0xFF;