const int taster = 9; 
const int led = 2;

bool aktTasterZustand = HIGH;
bool altTasterZustand = HIGH;
bool StatusLED = LOW;

unsigned long zeit1;
unsigned long zeit2;
int intervall = 30;



void setup() {
  pinMode(led, OUTPUT);
  pinMode(taster, INPUT_PULLUP);
  //Serial.begin(9600);
}

void loop() {
  aktTasterZustand = digitalRead(taster);

  zeit1 = millis();

  if((aktTasterZustand == LOW) && (altTasterZustand == HIGH)) {
    if(zeit1-intervall>=zeit2) {
      aktTasterZustand = digitalRead(taster);
      if(aktTasterZustand == LOW) {
        StatusLED = !StatusLED;
        digitalWrite(led, StatusLED);
        zeit2 = zeit1;
      }
    }
  }
  altTasterZustand = aktTasterZustand;
}