const int lpin=13;
const int bpin=2;
void setup() {
  pinMode(lpin, OUTPUT);
  pinMode(bpin, INPUT_PULLUP);
  // put your setup code here, to run once:

}

void loop() {
  int digitalval=digitalRead(bpin);
   if (digitalval==1)
  {
    digitalWrite(lpin, LOW);
  }
  else
  {
    digitalWrite(lpin, HIGH);
  }
  // put your main code here, to run repeatedly:

}