void setup() {
  // put your setup code here, to run once:
  Serial.begin(115200);
  pinMode(14, OUTPUT);
  pinMode(27, OUTPUT);
  pinMode(26, OUTPUT);
  Serial.println("Hello, ESP32!");
}

void loop() {
  digitalWrite(14, HIGH);
  digitalWrite(27, LOW);
  digitalWrite(26, LOW);
  Serial.println("LED ON");
  delay(3000);
digitalWrite(14, LOW);
Serial.println("LED OFF");
digitalWrite(27, HIGH);
digitalWrite(26, LOW);
delay(3000);
digitalWrite(27, LOW);
digitalWrite(26, HIGH);
delay(3000);
}