 void loop() {
 
   while (udp.parsePacket()) {
+digitalWrite(PIN_DEBUG, HIGH);
+                    
     // First read the header to make sure it's Art-Net
     unsigned int n = udp.read(udp_buffer, sizeof(ArtHeader));
     if (n >= sizeof(ArtHeader)) {

                  case 0: {
                      // Copy dmx data to the first 1/4 of led_data
                      memcpy(led_data_ptr_1, dmx->Data, dmx_length);
                      FastLED[0].show(led_data, NUM_RGB_LEDS_1, 255);
                      break;
                    }
                  case 1: {     
                      // Copy dmx data to the second 1/4 of the led_data              
                      memcpy(led_data_ptr_2, dmx->Data, dmx_length);
                      FastLED[0].show((CRGB*)led_data_ptr_1, NUM_RGB_LEDS_2, 255);
                      FastLED[1].show((CRGB*)led_data_ptr_2, NUM_RGB_LEDS_1, 255);
                      break;
                    }
                  case 2: {
                      memcpy(led_data_ptr_3, dmx->Data, dmx_length);
                      FastLED[0].show((CRGB*)led_data_ptr_1, NUM_RGB_LEDS_3, 255);
                      FastLED[1].show((CRGB*)led_data_ptr_2, NUM_RGB_LEDS_2, 255);
                      FastLED[2].show((CRGB*)led_data_ptr_3, NUM_RGB_LEDS_1, 255);
                      break;
                    }
                  case 3: {
                      memcpy(led_data_ptr_4, dmx->Data, dmx_length);
                      //FastLED[0].show((CRGB*)led_data_ptr_1, NUM_RGB_LEDS_4, 255);
                      FastLED[1].show((CRGB*)led_data_ptr_2, NUM_RGB_LEDS_3, 255);
                      FastLED[2].show((CRGB*)led_data_ptr_3, NUM_RGB_LEDS_2, 255);
                      FastLED[3].show((CRGB*)led_data_ptr_4, NUM_RGB_LEDS_1, 255);
                      break;
                    }
                }
              }
            }
            break;

          case OpAddress: {
              T_ArtAddress * address = (T_ArtAddress*)udp_buffer;


#define NUM_RGB_LEDS_1      (int)ceil(RGB_PER_UNIVERSE)

#define PIN_RESET 9
#define PIN_DEBUG 2
#define PIN_LED_1 5
#define PIN_LED_2 20
#define PIN_LED_3 8
