#include <Arduino.h>

void setup() {
  Serial.begin(115200);
  Serial.println("Init started");

  pinMode(LED_BUILTIN, OUTPUT);
  
}


void loop() {
  digitalWrite(LED_BUILTIN, HIGH);
  Serial.println("ON");
  delay(500);
  digitalWrite(LED_BUILTIN, LOW);
  Serial.println("OFF");
  delay(500);
}