void setup() {
  // put your setup code here, to run once:
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);
pinMode(13, OUTPUT);
}

void loop() {
  // put your main code here, to run repeatedly:
jalan1(); //pendeklarasian looping berulang
jalan2();
jalan3();
jalan4();
}

void jalan1(){
  digitalWrite(4, HIGH); //menghidupkan lampu merah diawal
  delay(100); //berapa lama waktu lampu untuk hidup
  digitalWrite(4, LOW); //mematikan lampu merah
  digitalWrite(3, HIGH); //menghidupkan lampu kuning 
  delay(400);
  digitalWrite(3, LOW); //mematikan lampu kuning
  digitalWrite(2, HIGH); //menghidupkan lampu hijau
  delay(3000);
  digitalWrite(2, LOW); //mematikan lampu hijau
  digitalWrite(3, HIGH); //menghidupkan lampu kuning
  delay(1000);
  digitalWrite(3, LOW); //mematikan lampu kuning
  digitalWrite(4, HIGH); //menghidupkan lampu merah kembali dan lanjut ke looping jalan selanjutnya
}

void jalan2(){
  digitalWrite(7, HIGH);
  delay(2000);
  digitalWrite(7, LOW);
  digitalWrite(6, HIGH);
  delay(400);
  digitalWrite(6, LOW);
  digitalWrite(5, HIGH);
  delay(3000);
  digitalWrite(5, LOW);
  digitalWrite(6, HIGH);
  delay(1000);
  digitalWrite(6, LOW);
  digitalWrite(7, HIGH);
}

void jalan3(){
  digitalWrite(10, HIGH);
  delay(2000);
  digitalWrite(10, LOW);
  digitalWrite(9, HIGH);
  delay(400);
  digitalWrite(9, LOW);
  digitalWrite(8, HIGH);
  delay(3000);
  digitalWrite(8, LOW);
  digitalWrite(9, HIGH);
  delay(1000);
  digitalWrite(9, LOW);
  digitalWrite(10, HIGH);
}

void jalan4(){
  digitalWrite(13, HIGH);
  delay(100);
  digitalWrite(13, LOW);
  digitalWrite(12, HIGH);
  delay(400);
  digitalWrite(12, LOW);
  digitalWrite(11, HIGH);
  delay(3000);
  digitalWrite(11, LOW);
  digitalWrite(12, HIGH);
  delay(400);
  digitalWrite(12, LOW);
  digitalWrite(13, HIGH);
}