bool Start = false;
bool Go    = false;
bool Kurve = false;
bool Ende  = false;

long unsigned int Fahren;

void setup() {
  pinMode(3, OUTPUT);
  pinMode(5, OUTPUT);
}

void loop() {
  while(Start == false){
    delay(2000);
    Start = true;
    Go = true;
    Fahren = millis();
  }

  while(Go == true){
    digitalWrite(3, HIGH);
    digitalWrite(5, HIGH);
    delay(5);
    digitalWrite(3,  LOW);
    digitalWrite(5,  LOW);
    delay(5);

    if(millis() - Fahren >= 5010){
      digitalWrite(3, LOW);
      digitalWrite(5, LOW);
      Go = false;
      Kurve  =  true;
      Fahren = millis();
    }
  }

  while(Kurve == true){
    digitalWrite(3, HIGH);
    delay(5);
    digitalWrite(3, LOW);
    delay(5);

    if(millis() - Fahren >= 2505){
      digitalWrite(3, LOW);
      Kurve = false;
      Ende  =  true;
      Fahren = millis();
    }
  }

  while(Ende == true){
    digitalWrite(3, HIGH);
    digitalWrite(5, HIGH);
    delay(5);
    digitalWrite(3, LOW);
    digitalWrite(5, LOW);
    delay(5);

    if(millis() - Fahren >= 5010){
      digitalWrite(3, LOW);
      digitalWrite(5, LOW);
      Ende = false;
    }
  }
}