void setup() {
  // laululintas 4 cabang pin 1-12
pinMode(1, OUTPUT);
pinMode(2, OUTPUT);
pinMode(3, OUTPUT);
pinMode(4, OUTPUT);
pinMode(5, OUTPUT);
pinMode(6, OUTPUT);
pinMode(7, OUTPUT);
pinMode(8, OUTPUT);
pinMode(9, OUTPUT);
pinMode(10, OUTPUT);
pinMode(11, OUTPUT);
pinMode(12, OUTPUT);

digitalWrite(3, HIGH);//LED WARNA MERAH NYALA TERUS
digitalWrite(6, HIGH);//LED WARNA MERAH NYALA TERUS
digitalWrite(9, HIGH);//LED WARNA MERAH NYALA TERUS
digitalWrite(12, HIGH);//LED WARNA MERAH NYALA TERUS
}

void loop() {
  // jalan 1
  digitalWrite(3, LOW);
  digitalWrite(2, HIGH);
  delay(300);
  digitalWrite(2, LOW);
  delay(300);
  digitalWrite(2, HIGH);
  delay(300);
  digitalWrite(2, LOW);
   digitalWrite(2, HIGH);
  delay(300);
  digitalWrite(2, LOW);
  delay(300);
   digitalWrite(2, HIGH);
  delay(300);
  digitalWrite(2, LOW);
  digitalWrite(1, HIGH);
  delay(2000);
  digitalWrite(1, LOW);
 digitalWrite(2, HIGH);
  delay(300);
  digitalWrite(2, LOW);
  delay(300);
  digitalWrite(2, HIGH);
  delay(300);
  digitalWrite(2, LOW);
   digitalWrite(2, HIGH);
  delay(300);
  digitalWrite(2, LOW);
  delay(300);
   digitalWrite(2, HIGH);
  delay(300);
  digitalWrite(2, LOW);
  digitalWrite(3, HIGH);

  // JALAN 2
  digitalWrite(6, LOW);
  digitalWrite(5, HIGH);
  delay(2000);
  digitalWrite(5, LOW);
  digitalWrite(4, HIGH);
  delay(500);
  digitalWrite(4, LOW);
  digitalWrite(5, HIGH);
  delay(2000);
  digitalWrite(5, LOW);
  digitalWrite(6, HIGH);

  //JALAN 3
    digitalWrite(9, LOW);
  digitalWrite(8, HIGH);
  delay(2000);
  digitalWrite(8, LOW);
  digitalWrite(7, HIGH);
  delay(500);
  digitalWrite(7, LOW);
  digitalWrite(8, HIGH);
  delay(2000);
  digitalWrite(8, LOW);
  digitalWrite(9, HIGH);

  //JALAN 4
  digitalWrite(12, LOW);
  digitalWrite(11, HIGH);
  delay(2000);
  digitalWrite(11, LOW);
  digitalWrite(10, HIGH);
  delay(500);
  digitalWrite(10, LOW);
  digitalWrite(11, HIGH);
  delay(2000);
  digitalWrite(11, LOW);
  digitalWrite(12, HIGH);
}