// Task 4: Traffic light
const int RED = 2;
const int YELLOW = 3;
const int GREEN = 4;
const int BUZZER = 5;
const int HIGH_PERIOD = 10000; // 10sec

void setup() {
  pinMode(RED, OUTPUT);
  pinMode(YELLOW, OUTPUT);
  pinMode(GREEN, OUTPUT);
  pinMode(BUZZER, OUTPUT);

  for (int i = 0; i<6; i++){
    digitalWrite(RED, HIGH);
    delay(HIGH_PERIOD);
    digitalWrite(RED, LOW);

    digitalWrite(YELLOW, HIGH);
    delay(HIGH_PERIOD);
    digitalWrite(YELLOW, LOW);

    digitalWrite(GREEN, HIGH);
    digitalWrite(BUZZER, HIGH);
    delay(HIGH_PERIOD);
    digitalWrite(GREEN, LOW);
    digitalWrite(BUZZER, LOW);
  }
}

void loop() {
}