reindeer_blink_eyes.ino

const int ledPin1 =  13;
const int ledPin2 =  6;
const int gnd =  7;
const long interval = 1000;
int ledState = LOW;

void setup() {
  pinMode(ledPin1, OUTPUT);
  pinMode(ledPin2, OUTPUT);
  
  pinMode(gnd, OUTPUT);
  digitalWrite(ledPin2, LOW);
  
}

void loop()
{
    if (ledState == LOW)
      ledState = HIGH;
    else
      ledState = LOW;

    digitalWrite(ledPin1, ledState);
    digitalWrite(ledPin2, ledState);
    delay(interval);
}