Arduino first timer!! Why don`t this program work

Projects Programming
8

Hope that this are posted correctly?

I am very grateful for your help.

  String Innkommende;
  int Skallsikring1 = 2;
  int Skallsikring2 = 3;
  int Skallsikring3 = 4;
  int UtgangAlarm = 13;
  void setup() {
      Serial.begin(9600);
      pinMode(Skallsikring1, INPUT);
      pinMode(Skallsikring2, INPUT);
      pinMode(Skallsikring3, INPUT);
      pinMode(UtgangAlarm, OUTPUT);
  }

  void loop() {
      if (Serial.available()) {
            if ((Skallsikring1 == HIGH) || (Skallsikring2 == HIGH)|| (Skallsikring3 == HIGH) == HIGH){
              digitalWrite(UtgangAlarm, HIGH);
                Serial.print("Situasjon:");
                Serial.println(7); 
          } else {
              digitalWrite(UtgangAlarm, LOW);
                Serial.print("Situasjon:");
                Serial.println(6);
          }

          
           
          delay(1000);
      }


  }