void setup() {
  // put your setup code here, to run once:
  Serial.begin(115200);
  pinMode(27, OUTPUT);
  pinMode(19, OUTPUT);
}

void loop() 
{
digitalWrite(27, HIGH);
delay(1000);
digitalWrite(27, LOW);
delay(1000);
digitalWrite(19, HIGH);
delay(1000);
digitalWrite(19, LOW);
delay(1000);
}