int leds[] = {4, 13, 18}
int tiempos[] = {5000, 2000, 3000} 

void setup() {

  for(int i=0; i<3; i++){
    pinMode(leds[i], OUTPUT);
  }
  // put your setup code here, to run once:
  Serial.begin(115200);
  Serial.println("Hello, ESP32!");
}

void loop() {
  for (int i =0; i<3; i++){
    for(int j=0; j<3; j++){
      digitalWrite(leds[i], LOW);
    }
    digitalWrite(leds[i], HIGH);
    delay(tiempos[i];
  }

}