#define LED1 14
#define LED2 25
int counter=0;

void setup() {
  // put your setup code here, to run once:
  Serial.begin(9600);
  pinMode(LED1, OUTPUT);
  pinMode(LED2, OUTPUT);
}

void loop() {
  // put your main code here, to run repeatedly:
  digitalWrite(LED1, HIGH);
  delay(500);
  digitalWrite(LED1, LOW);
  delay(500);
  counter++;
  Serial.println(counter);
  if (counter==2) {
    digitalWrite(LED2, HIGH);
    delay(500);
    digitalWrite(LED2, LOW);
    delay(500);
    counter=0;
  }
}