const int buttonPin = 13;  // the pin that the button is connected to
int buttonState = 0;      // variable to store the state of the button

void setup() {
  pinMode(buttonPin, INPUT);  // initialize the button pin as an input
  Serial.begin(9600);         // initialize serial communication at 9600 bits per second
}

void loop() {
  buttonState = digitalRead(buttonPin);  // read the state of the button
  Serial.println(buttonState);          // print the state of the button (0 for LOW, 1 for HIGH)
  delay(100);                           // delay to avoid reading the button state too quickly
}