//#define SERIAL_ADDRESS 1
#define SERIAL_ADDRESS 2

#define LED 4
// define LED

void setup() {
   pinMode(LED, OUTPUT);
   
  
   Serial.begin(9600);

   digitalWrite(LED, LOW);
}

int receivedByte;

void loop() {
  while (Serial.available() == 0) {;}
  receivedByte = Serial.read();

  
  if (receivedByte == SERIAL_ADDRESS) {
    digitalWrite(LED, HIGH);
    

    while (Serial.available() == 0) {;}
    receivedByte = Serial.read();

    
    if (receivedByte == 1) {

      digitalWrite(LED, HIGH);
      delay(500);
      digitalWrite(LED,LOW);
      delay(200);
      digitalWrite(LED, HIGH);
      delay(500);
      digitalWrite(LED,LOW);
      delay(200);
    } else {
      digitalWrite(LED, LOW);
    }
  } else {
    digitalWrite(LED, LOW);


    while (Serial.available() == 0) {;}
    receivedByte = Serial.read();
  }
}