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

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

  if(Serial.available())
  {
    char c = Serial.read();
    if(c == '1')
    {
    digitalWrite(13,HIGH);
    Serial.println("Led Yandı");
    }
    else if(c == '0')
    {
    digitalWrite(13,LOW);
    Serial.println("Led Söndü");
    }
}
}