int LED=13;
int counter=0;
void setup() {
  // put your setup code here, to run once:
pinMode(LED, OUTPUT);
Serial.begin(9600);
}

void loop() {
  // put your main code here, to run repeatedly:
counter=counter+1; //adding one everytime it loops
Serial.print("Blink Number #");
Serial.println(counter);
digitalWrite(LED, HIGH);
delay(1000);
digitalWrite(LED, LOW);
delay(1000);
}