void setup() {
  // put your setup code here, to run once:
  Serial.begin(115200);
  //traffic light 1;
  pinMode(27, OUTPUT);
  pinMode(14, OUTPUT);
  pinMode(12, OUTPUT);


//traffic light 1;
  pinMode(21, OUTPUT);
  pinMode(5, OUTPUT);
  pinMode(4, OUTPUT);
}


void loop() {
digitalWrite(27, HIGH);
digitalWrite(4, HIGH);


delay(1000);


digitalWrite(27, LOW);
digitalWrite(4, LOW);
delay(1000);


digitalWrite(14, HIGH);
digitalWrite(5, HIGH);//
delay(1000);
digitalWrite(14, LOW);
digitalWrite(5, LOW);
delay(1000);
digitalWrite(12, HIGH);
digitalWrite(21, HIGH);
delay(1000);
digitalWrite(12, LOW);
digitalWrite(21, LOW);
delay(1000);
  // put your main code here, to run repeatedly:
 // delay(10); // this speeds up the simulation
}