// Define pin numbers
#define LED_PIN D7
#define BUTTON_PIN D6

// Setup function runs once when you press reset or power the board
void setup() {
  // Initialize LED pin as an output
  pinMode(LED_PIN, OUTPUT);
  // Initialize button pin as an input
  pinMode(BUTTON_PIN, INPUT_PULLUP);
}

// Loop function runs repeatedly as long as the board has power
void loop() {
  // Check if the button is pressed
  if (digitalRead(BUTTON_PIN) == LOW) { // Button is active low
    // Turn on the LED
    digitalWrite(LED_PIN, HIGH);
  } else {
    // Turn off the LED
    digitalWrite(LED_PIN, LOW);
  }
}