void setup() {
  // put your setup code here, to run once:
pinMode(12, OUTPUT);
Serial.begin(19600);
}

void loop() {
  // put your main code here, to run repeatedly:
digitalWrite(12,HIGH);
Serial.println("Strom an");
delay(1000);
digitalWrite(12, LOW);
Serial.println("Strom aus");
delay(1000);
}