const int LED = 13;

void setup() {
  // put your setup code here, to run once:
pinMode(LED, OUTPUT);
pinMode(PD2, INPUT);
}

void loop() {
  // put your main code here, to run repeatedly:

digitalWrite(LED, digitalRead(PD2)); // LED anschalten
//delay(1); // 50 ms warten
//digitalWrite(LED, LOW); // LED ausschalten
delay(100); // 10 Sekunden warten
}