// Define the pin numbers for the button and LED
const int buttonPin = D1;  // Where the button is connected
const int ledPin =  D0;    // Where the LED is connected

void setup() {
  // Set the button pin as INPUT
  pinMode(buttonPin, INPUT);
  
  // Set the LED pin as OUTPUT
  pinMode(ledPin, OUTPUT);
}

void loop() {
  // Read the state of the button
  int buttonState = digitalRead(buttonPin);

  // Check if the button is pressed
  if (buttonState == HIGH) {
    // If the button is pressed, turn on the LED
    digitalWrite(ledPin, HIGH);
  } else {
    // If the button is not pressed, turn off the LED
    digitalWrite(ledPin, LOW);
  }
}