void setup() {
  // put your setup code here, to run once:
  pinMode(LED_BUILTIN, OUTPUT);
  Serial.begin(115200);
}

void loop() {
  // put your main code here, to run repeatedly:
  Serial.println("Led ON !!!");
  digitalWrite(LED_BUILTIN, HIGH);
  delay(3000);
  Serial.println("Led OFF RED !!!");
  digitalWrite(LED_BUILTIN, LOW);
  delay(3000);
}