const int ledPin = 3;
const int buttonPin = 2;
bool ledState = false;
bool lastButtonState = LOW;

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

void loop() {
  bool currentButtonState = digitalRead(buttonPin);

  if (currentButtonState == HIGH && lastButtonState == LOW) {
    ledState = !ledState;
    digitalWrite(ledPin, ledState);
    delay(200);
  }

  lastButtonState = currentButtonState;
}