// Define LEDs pin
const int RED_PIN = 5;
const int YELLOW_PIN = 18;
const int GREEN_PIN = 19;

// Define LEDs state
bool isRedOn = false;
bool isYellowOn = false;
bool isGreenOn = false;

void setup(){
  // Set LEDs pin as output
  pinMode(RED_PIN, OUTPUT);
  pinMode(YELLOW_PIN, OUTPUT);
  pinMode(GREEN_PIN, OUTPUT);
}

void loop(){
  // Turn on red and yellow LEDs for 3 seconds
  digitalWrite(RED_PIN, HIGH);
  digitalWrite(YELLOW_PIN, HIGH);
  isRedOn = true;
  isYellowOn = true;
  delay(3000);

  // Turn off yellow LED
  digitalWrite(YELLOW_PIN, LOW);
  isYellowOn = false;

  // Turn off green LED if red and yellow are on together
  if(isRedOn && isYellowOn){
    digitalWrite(GREEN_PIN, LOW);
    isGreenOn = false;
  }

  // Turn on green LED for 5 seconds
  digitalWrite(GREEN_PIN, HIGH);
  isGreenOn = true;
  delay(5000);

  // Blink yellow LED every 1 second and turn off red LED
  if(isGreenOn){
    digitalWrite(RED_PIN, LOW);
    isRedOn = false;
    while(isGreenOn){
      digitalWrite(YELLOW_PIN, HIGH);
      delay(1000);
      digitalWrite(YELLOW_PIN, LOW);
      delay(1000);
    }
  }
}

// Merah Nyala Kuning Blinking Hijau Mati
// Merah Mati Kuning Blinking Hijau Nyala