const int ledPin = 13;
const int buttonPin = 2;
int buttonState = 0;
int lastButtonState = 0;
unsigned long previousMillis = 0;
const long interval = 1000;
boolean ledState = false;
void setup() {

  pinMode(ledPin, OUTPUT);
  

  pinMode(buttonPin, INPUT);
}

void loop() {

  buttonState = digitalRead(buttonPin);


  if (buttonState != lastButtonState) {
    if (buttonState == LOW) {
      digitalWrite(ledPin, LOW);
    } 
    
    else {

      previousMillis = millis();
    }
  }


  lastButtonState = buttonState;


  unsigned long currentMillis = millis();
  if (currentMillis - previousMillis >= interval) {
    
    previousMillis = currentMillis;

  
    ledState = !ledState;

    
    digitalWrite(ledPin, ledState ? HIGH : LOW);
  }
}