void setup() {
  // put your setup code here, to run once:
  pinMode(LED_BUILTIN, OUTPUT);
  pinMode(12,OUTPUT);
}

void loop() {
  // put your main code here, to run repeatedly:
    digitalWrite(LED_BUILTIN, HIGH);
   // digitalWrite(12, HIGH);
    delay(1000);
    digitalWrite(LED_BUILTIN,LOW);
    // digitalWrite(13,LOW);
    delay(1000);

}