int merah = 18;
int kuning = 16;
int hijau = 17;

void setup() {
  pinMode(merah, OUTPUT);
  pinMode(kuning, OUTPUT);
  pinMode(hijau, OUTPUT);
  Serial.begin(115200);
  Serial.println("hello,eESP32!");
}
  void loop(){
    digitalWrite(merah, HIGH);
    Serial.println("berhenti");
    delay(10000);
    digitalWrite(merah, LOW);

    digitalWrite(kuning, HIGH);
    Serial.println("hati hati");
    delay(3000);
    digitalWrite(kuning, LOW);
    
    digitalWrite(hijau, HIGH);
    Serial.println("jalan");
    delay(7000);
    digitalWrite(hijau, LOW);
  }