// Whats new on this Version: Try on a single route traffic light
const int NR = 23;
const int NY = 22;
const int NG = 21;

void setup() {
  // put your setup code here, to run once:
  Serial.begin(115200);
  Serial.println("Hello, ESP32!");
  pinMode (NR, OUTPUT);
  pinMode (NY, OUTPUT);
  pinMode (NG, OUTPUT);
}

void loop() {
  digitalWrite(NR, HIGH);
  digitalWrite(NY, LOW);
  digitalWrite(NG, LOW);
  delay(500);
  digitalWrite(NR, LOW);
  digitalWrite(NY, HIGH);
  digitalWrite(NG, LOW);
  delay(500);
  digitalWrite(NR, LOW);
  digitalWrite(NY, LOW);
  digitalWrite(NG, HIGH);
  delay(500);
}