int ledhijau1=0;
int ledkuning1=1;
int ledmerah1=2;

int ledhijau2=3;
int ledkuning2=4;
int ledmerah2=5;

int ledhijau3=6;
int ledkuning3=7;
int ledmerah3=8;

void setup() {
  pinMode(ledhijau1, OUTPUT);
  pinMode(ledkuning1, OUTPUT);
  pinMode(ledmerah1, OUTPUT);
  pinMode(ledhijau2, OUTPUT);
  pinMode(ledkuning2, OUTPUT);
  pinMode(ledmerah2, OUTPUT);
  pinMode(ledhijau3, OUTPUT);
  pinMode(ledkuning3, OUTPUT);
  pinMode(ledmerah3, OUTPUT);
}

void kedip_kuning(){
  for (int i=1; i<=3;i++){
  digitalWrite(ledkuning1, HIGH);
  digitalWrite(ledkuning2, HIGH);
  digitalWrite(ledkuning3, HIGH);
  delay(500);
  digitalWrite(ledkuning1, LOW);
  digitalWrite(ledkuning2, LOW);
  digitalWrite(ledkuning3, LOW);
  delay(500);
  }
}

void loop() {
  digitalWrite(ledhijau1, HIGH);
  digitalWrite(ledmerah2, HIGH);
  digitalWrite(ledmerah3, HIGH);

  digitalWrite(ledhijau3, LOW);
  digitalWrite(ledmerah1, LOW);
  delay(3000);

  kedip_kuning();

  digitalWrite(ledhijau1, LOW);
  digitalWrite(ledmerah1, HIGH);
  digitalWrite(ledmerah2, LOW);
  digitalWrite(ledhijau2, HIGH);
  delay(3000);

  kedip_kuning();

  digitalWrite(ledhijau2, LOW);
  digitalWrite(ledmerah2, HIGH);
  digitalWrite(ledmerah3, LOW);
  digitalWrite(ledhijau3, HIGH);
  delay(3000);

  kedip_kuning();
}