#define LED 13

void setup() 
{
  pinMode(LED, OUTPUT);
  Serial.begin(9600);
  Serial.println("layan bsoul");
  delay(2000);
}

void loop()
{
  digitalWrite(LED, 1);
  Serial.println("LED ON");
  delay(2000);
  digitalWrite(LED, 0);
  Serial.println("LED OFF");
  delay(2000);
}