void setup() {
  // put your setup code here, to run once:
  Serial.begin(115200);
  Serial.println("Hello, ESP32!");
  pinMode(23, OUTPUT);
  pinMode(19, OUTPUT);

}

void loop()
{
  delay(10);
  digitalWrite(23, LOW);
  digitalWrite(19, LOW);
  delay(1000);
  digitalWrite(23, HIGH);
  digitalWrite(19, HIGH);
  delay(1000);
}