//code sourced from [Bytes N Bits]

long x;
void setup() {
  // put your setup code here, to run once:
  pinMode(13, OUTPUT);
  Serial.begin(9600);
  digitalWrite(13, LOW);
  Serial.println("please enter 0 or 1 to light the led");


  
}

void loop() {
  if(Serial.available()){
    x=Serial.read();
  }
  if (x=='0'){
    digitalWrite(13, LOW);

  }
  else if(x=='1'){
    digitalWrite(13, HIGH);
  }
   
}