#define LED 2 

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

void loop() {
  // put your main code here, to run repeatedly:
digitalWrite(LED, LOW);
delay(5);
Serial.println("ON");
digitalWrite(LED, HIGH);
delay(5054);
Serial.println("OFF");
}