int buttonPin = 2;
int ledPin = 6;
bool buttonState = false;

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

void loop() {
  buttonState = digitalRead(buttonPin);

  if (buttonState == HIGH){
    digitalWrite(ledPin, LOW);   
  } else {
    digitalWrite(ledPin, HIGH);  
  }
}