int Mode;
void setup() 
{
 Serial.begin(115200);
  pinMode (13,OUTPUT);

}

void loop() 
{
  int n = Serial.available();
  if (n > 0)
  {
    byte c = Serial.read();
    Serial.write(c);
    if (c == '1')
     digitalWrite(13,1);
    if (c == '0')
     digitalWrite(13,0);

     Mode = c;
  }
    if(Mode == '2')
  
  {
     digitalWrite(13,1);
     delay(5);
      digitalWrite(13,0);
     delay(5);
  }
  
   delay(1);
}