#define LED 12


 void setup() {
  // put your setup code here, to run once:
  pinMode(LED_BUILTIN, OUTPUT);
  pinMode(LED, OUTPUT);

}

void loop() {
  // put your main code here, to run repeatedly:
  digitalWrite(LED_BUILTIN, HIGH);
  digitalWrite(LED, LOW);
  delay(1000);
  digitalWrite(LED_BUILTIN, LOW);
  digitalWrite(LED, HIGH);
  delay(1000);
  
  
}