int buttonState=0;
void setup()
{
  pinMode(2,INPUT);
  pinMode(LED_BUILTIN, OUTPUT);
}
void loop()
{
  buttonState=digitalRead(2);
  if(buttonState==HIGH){

    digitalWrite(LED_BUILTIN, HIGH);
    }else{
      digitalWrite(LED_BUILTIN, LOW);
      
  }
  delay(10);
}