const int ledPin = 5; // LED connected to digital pin 5
const int buttonPin = 4; // Button connected to digital pin 4
int buttonState = LOW;

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

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

  if (buttonState == LOW) {
    digitalWrite(ledPin, HIGH); // Turn LED on
  } else {
    digitalWrite(ledPin, LOW); // Turn LED off
  }
}