const int buttonPin = 2;
const int ledPin = 13;

int buttonState = 0;

void setup()
{
  pinMode(ledPin, OUTPUT);
  pinMode(buttonPin, OUTPUT);
}

void loop()
{ 
  buttonState = digitalRead(buttonPin);
  if (buttonState==HIGH){
    digitalWrite(ledPin, HIGH);
  }
  else{
    digitalWrite(ledPin, LOW);
  }
}