#include <Arduino.h>

void setup() {
  Serial.begin(9600);
  while (!Serial) {
    delay(100);
  }
  Serial.println("Starting");
  pinMode(2,OUTPUT);
}

void loop() {
  digitalWrite(2,HIGH);
  Serial.println("ON");
  sleep(1);
  digitalWrite(2,LOW);
  Serial.println("OFF");
  sleep(1);
}