// Button on pin 2 controlling an LED

const int buttonPin = 2;           // Button connected to pin 2
const int ledPin = 6;   

void setup() {
  pinMode(buttonPin, INPUT_PULLUP); 
  pinMode(ledPin, OUTPUT);
}
void loop() {
  int buttonState = digitalRead(buttonPin);
  // Button pressed = LOW
  // Button released = HIGH
  if (buttonState == HIGH) {
    digitalWrite(ledPin, HIGH);  // Turn LED ON
  } else {
    digitalWrite(ledPin, LOW);   // Turn LED OFF
  }
}