int ledPin = 13;

int LDR_PIN = 2;

int switchState1 = 0;
int switchPin1 = 5;

int switchState2 = 0; 
int switchPin2 = 4;

int interval = 300;
int state = 1;
unsigned long timenow = 0;
unsigned long timestart = 0;

void setup() {
  // put your setup code here, to run once:
  pinMode(LDR_PIN, INPUT);
  pinMode(ledPin, OUTPUT);
  pinMode(switchPin1, INPUT_PULLUP);
  pinMode(switchPin2, INPUT_PULLUP);
  unsigned long timestart = millis();
}

void loop() {
  // put your main code here, to run repeatedly:
  switchState1 = digitalRead(switchPin1);

  if(switchState1 == HIGH){
    switchState2 = digitalRead(switchPin2);
    if(switchState2 == HIGH){
      //auto-mode photoresistor with a state and when switching start measuring time and timediff is > 300 && dark turn led on else off if >300 && light 
      timenow = millis();
      if(digitalRead(LDR_PIN) == LOW){ //licht gemessen
        if(state == 1){ // ist schon hell 
           if(timenow - timestart >= interval){ //lange genug Hell für Ausschalten
            digitalWrite(ledPin, LOW);
           }
        }else{
          timestart = timenow;
          state = 1;//Wechsel von vorher Dunkel zu Hell
        }
      }else{ //dunkel
        if(state == 0){ // ist schon dunkel 
           if(timenow - timestart >= interval){ //lange genug Dunkel für Anschalten
            digitalWrite(ledPin, HIGH);
           }
        }else{
          timestart = timenow;
          state = 0;//Wechsel von vorher Hell zu Dunkel
        }
       }
       
    }else{
      //ON
      digitalWrite(ledPin,HIGH);
    }
  }else{
    //OFF
    digitalWrite(ledPin,LOW);
  }
}