#define led_pin 2 // Arduino number 

void setup() {
  // put your setup code here, to run once:
  pinMode(led_pin, OUTPUT);

  for (int x = 0; x < 10; x++)
  {
    digitalWrite(led_pin, HIGH);
    delay(1000);
    digitalWrite(led_pin, LOW);
    delay(1000);
  }
}

void loop() {
  // put your main code here, to run repeatedly:

//  digitalWrite(led_pin, HIGH);
}