Neopixel background LED option (#14025)

config/examples/Tronxy/XY100/Configuration.h

@@ -2100,6 +2100,10 @@
   #define NEOPIXEL_IS_SEQUENTIAL   // Sequential display for temperature change - LED by LED. Disable to change all LEDs at once.
   #define NEOPIXEL_BRIGHTNESS 127  // Initial brightness (0-255)
   //#define NEOPIXEL_STARTUP_TEST  // Cycle through colors at startup
+
+  // Use a single Neopixel LED for static (background) lighting
+  //#define NEOPIXEL_BKGD_LED_INDEX  0               // Index of the LED to use
+  //#define NEOPIXEL_BKGD_COLOR { 255, 255, 255, 0 } // R, G, B, W
 #endif
 
 /**