//lampu lalu lintas simpang 4

void setup(){
  for (int i = 2; i < 14; i++) {
    pinMode(i, OUTPUT);
    digitalWrite(i, LOW); // mematikan semua lampu
  }
  //menghidupkan lampu merah Jalan Utara, Barat, Selatan, Timur
  digitalWrite(4, HIGH);
  digitalWrite(7, HIGH);
  digitalWrite(10, HIGH);
  digitalWrite(13, HIGH);
  delay(2000);
}

void loop(){
  Jalan_Utara ();
  delay(1000);
  Jalan_Barat ();
  delay(1000);
  Jalan_Selatan ();
  delay(1000);
  Jalan_Timur ();
  delay(1000);
}

void Jalan_Selatan(){
  digitalWrite(4, LOW);
  digitalWrite(2, HIGH);
  delay(5000);
  digitalWrite(2, LOW);
  digitalWrite(3, HIGH);
  delay(2000);
  digitalWrite(3, LOW);
  digitalWrite(4, HIGH);
}

void Jalan_Timur(){
  digitalWrite(7,LOW);
  digitalWrite(5, HIGH);
  delay(5000);
  digitalWrite(5, LOW);
  digitalWrite(6, HIGH);
  delay(2000);
  digitalWrite(6, LOW);
  digitalWrite(7, HIGH);
}

void Jalan_Utara(){
  digitalWrite(10, LOW);
  delay(5000);
  digitalWrite(8, HIGH);
  digitalWrite(8, LOW);
  digitalWrite(9, HIGH);
  delay(2000);
  digitalWrite(9, LOW);
  digitalWrite(10, HIGH);
}

void Jalan_Barat(){
  digitalWrite(13,LOW);
  digitalWrite(11, HIGH);
  delay(5000);
  digitalWrite(11,LOW);
  digitalWrite(12, HIGH);
  delay(2000);
  digitalWrite(12,LOW);
  digitalWrite(13, HIGH);
}