#define TASTERPIN 2
#define RESETPIN 4
int LED_PINS[] = {8, 9, 10, 11}; 

void setup() {
  Serial.begin(9600);
  pinMode(TASTERPIN, INPUT_PULLUP);
   for (int i = 0; i < 4; i++) {
    pinMode(LED_PINS[i], OUTPUT); 
   }
  pinMode(RESETPIN, INPUT_PULLUP);

}
void loop() {
  bool tasterstatus = digitalRead(TASTERPIN);
  static bool vorherigerTasterstatus = HIGH;
  static int zaehlwert = 0;

  if (digitalRead(RESETPIN) == LOW) { //RESETPIN aktiviert? 
    zaehlwert = 0 ; 
    digitalWrite(LED_PINS[0], LOW);
    digitalWrite(LED_PINS[1], LOW);
    digitalWrite(LED_PINS[2], LOW);
    digitalWrite(LED_PINS[3], LOW);
    

  }
  delay (50); 
  if (zaehlwert == 15 && tasterstatus == LOW && vorherigerTasterstatus == HIGH){ //Überlauf 
    zaehlwert = 0; 
    digitalWrite(LED_PINS[0], LOW);
    digitalWrite(LED_PINS[1], LOW);
    digitalWrite(LED_PINS[2], LOW);
    digitalWrite(LED_PINS[3], LOW);
    Serial.print("Zählwert: ");
    Serial.println(zaehlwert);
    vorherigerTasterstatus = LOW ;
  }
      if (tasterstatus == LOW && vorherigerTasterstatus == HIGH ) {
    zaehlwert ++; // Zählwert erhöhen
    Serial.print("Zählwert: ");
    Serial.println(zaehlwert);
    delay (50); //Entprellen nach Druck
  }
  vorherigerTasterstatus = tasterstatus;
  

  // Überprüfen, ob der Taster gedrückt wurde
  
  switch (zaehlwert)
  {
    case 0: 
    digitalWrite(LED_PINS [0], LOW);
    digitalWrite(LED_PINS [1], LOW);
    digitalWrite(LED_PINS [2], LOW); 
    digitalWrite(LED_PINS [3], LOW);
    break;

    case 1:
    digitalWrite(LED_PINS [0], HIGH);
    break ;
    case 2:
    digitalWrite(LED_PINS [0], LOW);
    digitalWrite(LED_PINS [1], HIGH);
    break ;
    case 3:
    digitalWrite(LED_PINS[0], HIGH);
    break ;
    case 4:
    digitalWrite(LED_PINS [0], LOW);
    digitalWrite(LED_PINS [1], LOW);
    digitalWrite (LED_PINS[2], HIGH); 
    break ;
    case 5:
    digitalWrite(LED_PINS [0], HIGH);
    break ;
    case 6:
    digitalWrite(LED_PINS [0], LOW);
    digitalWrite (LED_PINS [1], HIGH);
    break ;
    case 7: 
    digitalWrite(LED_PINS [0], HIGH);
    break ;
    case 8: 
    digitalWrite(LED_PINS [0], LOW);
    digitalWrite(LED_PINS [1], LOW);
    digitalWrite(LED_PINS [2], LOW); 
    digitalWrite(LED_PINS [3], HIGH);
    break ;
    case 9: 
    digitalWrite(LED_PINS [0], HIGH);
    break ;
    case 10: 
    digitalWrite(LED_PINS [0], LOW); 
    digitalWrite(LED_PINS [1], HIGH);
    break ;
    case 11:
    digitalWrite(LED_PINS [0], HIGH);
    break ;
    case 12:
    digitalWrite(LED_PINS [0], LOW);
    digitalWrite(LED_PINS [1], LOW);
    digitalWrite(LED_PINS[2], HIGH);
    break ;
    case 13:
    digitalWrite(LED_PINS [0], HIGH);
    break ;
    case 14:
    digitalWrite(LED_PINS [0], LOW);
    digitalWrite (LED_PINS[1], HIGH);
    break ;
    case 15:
    digitalWrite(LED_PINS[0], HIGH); 
    break ; 
  
  }
}