#define LED_PIN 2
#define BUTTON_PIN 0

bool ledState = LOW;
bool lastButtonState = LOW;

void setup() {
  pinMode(LED_PIN, OUTPUT);
  pinMode(BUTTON_PIN, INPUT_PULLUP);
}

void loop() {
  int buttonState = digitalRead(BUTTON_PIN);
  
  if (buttonState == HIGH && lastButtonState == LOW) {
    ledState = !ledState;
    digitalWrite(LED_PIN, ledState);
    delay(200);
  }
  
  lastButtonState = buttonState;
}