const int buttonPin = 2;
const int ledPin = 13;
bool ledState = false; 
unsigned long lastTime = 0; 

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

void loop() {
  if (digitalRead(buttonPin) == LOW && millis() - lastTime > 50) {
    ledState = !ledState;
    digitalWrite(ledPin, ledState); 
    lastTime = millis();
  }
}