void setup() {
  // put your setup code here, to run once:
  Serial.begin(115200);

  //trafic light 1
  pinMode(27, OUTPUT);
  pinMode(14, OUTPUT);
  pinMode(12, OUTPUT);

  //trafic light 2
  pinMode(21, OUTPUT);
  pinMode(5, OUTPUT);
  pinMode(4, OUTPUT);

}

void loop() {


  
  digitalWrite(12, LOW);
  digitalWrite(21, LOW);

  digitalWrite(27, HIGH);
  digitalWrite(4, HIGH);

  delay(5000);

  digitalWrite(27, LOW);
  digitalWrite(4, LOW);

  digitalWrite(14, HIGH);
  digitalWrite(5, HIGH);

  delay(1000);

  digitalWrite(14, LOW);
  digitalWrite(5, LOW);

  digitalWrite(12, HIGH);
  digitalWrite(21, HIGH);
  delay(5000);
}