const int hijau1=0;
const int kuning1=1;
const int merah1=2;

const int hijau2=3;
const int kuning2=4;
const int merah2=5;

const int hijau3=9;
const int kuning3=10;
const int merah3=11;

const int hijau4=6;
const int kuning4=7;
const int merah4=8;

void setup() {
  //pinMode(led, OUTPUT);
  pinMode(hijau1, OUTPUT);
  pinMode(kuning1, OUTPUT);
  pinMode(merah1, OUTPUT);

  pinMode(hijau2, OUTPUT);
  pinMode(kuning2, OUTPUT);
  pinMode(merah2, OUTPUT);

  pinMode(hijau3, OUTPUT);
  pinMode(kuning3, OUTPUT);
  pinMode(merah3, OUTPUT);

  pinMode(hijau4, OUTPUT);
  pinMode(kuning4, OUTPUT);
  pinMode(merah4, OUTPUT);
}

void loop() {

  sisi1hijau();
  delay(4000);
  kedipKuning12();
  digitalWrite(hijau1, LOW); 
  digitalWrite(merah2, LOW);

  sisi2hijau(); 
  delay(4000);
  kedipKuning23();
  digitalWrite(hijau2, LOW); 
  digitalWrite(merah3, LOW);

  sisi3hijau();
  delay(4000);
  kedipKuning34();
  digitalWrite(hijau3, LOW); 
  digitalWrite(merah4, LOW);

  sisi4hijau(); 
  delay(4000);
  kedipKuning41();
  digitalWrite(hijau4, LOW); 
  digitalWrite(merah1, LOW);                     
  
}

void sisi1hijau(){
  digitalWrite(hijau1, HIGH); 
  digitalWrite(merah2, HIGH);
  digitalWrite(merah3, HIGH);
  digitalWrite(merah4, HIGH); 
}

void sisi2hijau(){
  digitalWrite(hijau2, HIGH); 
  digitalWrite(merah3, HIGH);
  digitalWrite(merah4, HIGH);
  digitalWrite(merah1, HIGH);
}

void sisi3hijau(){
  digitalWrite(hijau3, HIGH); 
  digitalWrite(merah4, HIGH);
  digitalWrite(merah1, HIGH);
  digitalWrite(merah2, HIGH);
}

void sisi4hijau(){
  digitalWrite(hijau4, HIGH); 
  digitalWrite(merah1, HIGH);
  digitalWrite(merah2, HIGH);
  digitalWrite(merah3, HIGH);
}

void kedipKuning12(){
  for (int i = 1; i <= 3; i++){
    digitalWrite(kuning1, HIGH);
    digitalWrite(kuning2, HIGH);    
    delay(500);                     
    digitalWrite(kuning1, LOW);
    digitalWrite(kuning2, LOW);
    delay(500);  
  }
}

void kedipKuning23(){
  for (int i = 1; i <= 3; i++){
    digitalWrite(kuning2, HIGH);
    digitalWrite(kuning3, HIGH);    
    delay(500);                     
    digitalWrite(kuning2, LOW);
    digitalWrite(kuning3, LOW);
    delay(500);  
  }
}

void kedipKuning34(){
  for (int i = 1; i <= 3; i++){
    digitalWrite(kuning3, HIGH);
    digitalWrite(kuning4, HIGH);    
    delay(500);                     
    digitalWrite(kuning3, LOW);
    digitalWrite(kuning4, LOW);
    delay(500);  
  }
}

void kedipKuning41(){
  for (int i = 1; i <= 3; i++){
    digitalWrite(kuning4, HIGH);
    digitalWrite(kuning1, HIGH);    
    delay(500);                     
    digitalWrite(kuning4, LOW);
    digitalWrite(kuning1, LOW);
    delay(500);  
  }
}