int led_merah = 22;
int led_kuning = 21;
int led_hijau = 17;


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

void loop() {
  digitalWrite(led_hijau,LOW);
  digitalWrite(led_merah, HIGH);
  digitalWrite(led_kuning, LOW);
  delay(4000);
  digitalWrite(led_kuning, HIGH);
  delay(500);
  digitalWrite(led_kuning, LOW);
  delay(500);
  digitalWrite(led_kuning, HIGH);
  delay(500);
  digitalWrite(led_kuning, LOW);
  delay(500);
  digitalWrite(led_kuning, HIGH);
  delay(500);
  digitalWrite(led_kuning, LOW);
  delay(500);
  digitalWrite(led_kuning, HIGH);
  delay(500);
  digitalWrite(led_kuning, LOW);
  delay(500);
  digitalWrite(led_merah, LOW);

  digitalWrite(led_merah,LOW);
  digitalWrite(led_kuning, LOW);
  digitalWrite(led_hijau, HIGH);
  delay(4000);
}