#define BLU_LED_PIN 25
#define GRN_LED_PIN 16
#define RED_LED_PIN 17
#define BLINK_RATE 500
// half a second

int count = 0;

#ifdef BLU_LED_PIN
// if not defined then code is ignored
void setup() {
  // put your setup code here, to run once:
  pinMode(BLU_LED_PIN, OUTPUT);
  pinMode(GRN_LED_PIN, OUTPUT);
  pinMode(RED_LED_PIN, OUTPUT);
  #ifdef DEBUG
  Serial.begin(9600);
  #endif
}

#endif 

void loop() {
  // high and low are reversed because it's already connected to 3.3V
  // put your main code here, to run repeatedly:
  digitalWrite(GRN_LED_PIN, HIGH);
  digitalWrite(BLU_LED_PIN, HIGH);
  digitalWrite(RED_LED_PIN, HIGH);
  delay(BLINK_RATE);
  digitalWrite(RED_LED_PIN, LOW);
  char c = Serial.read();
  delay(BLINK_RATE);
  count++;
  Serial.print("Count:");
  Serial.println(count);
  //print line (adds a new line)
}