int buttonPin = 2;     // the number of the pushbutton pin
 int led1Pin =  13;     // the number of the first LED pin
 int led2Pin =  12;     // the number of the second LED pin

int buttonState = 0;         // current state of the button
int lastButtonState = HIGH;  // previous state of the button (with pull-up)
unsigned long pressStartTime = 0; // when the button was pressed
bool longPressDetected = false;

void setup() {
  pinMode(led1Pin, OUTPUT);
  pinMode(led2Pin, OUTPUT);
  pinMode(buttonPin, INPUT_PULLUP); // using internal pull-up resistor
}

void loop() {
  buttonState = digitalRead(buttonPin);

  // Check for button press (LOW because of pull-up)
  if (buttonState == LOW && lastButtonState == HIGH) {
    // Button was just pressed
    pressStartTime = millis();
    longPressDetected = false;
  }

  // Check for button release (HIGH because of pull-up)
  if (buttonState == HIGH && lastButtonState == LOW) {
    // Button was just released
    if (!longPressDetected) {
      // If it wasn't a long press, it's a short press
      if (millis() - pressStartTime < 1000) {
        toggleLED(led1Pin);
      }
    }
  }

  // Check for long press while button is still held down
  if (buttonState == LOW && !longPressDetected) {
    if (millis() - pressStartTime >= 1000) {
      longPressDetected = true;
      toggleLED(led2Pin);
    }
  }

  lastButtonState = buttonState; // save the current state for next loop
}

void toggleLED(int ledPin) {
  digitalWrite(ledPin, !digitalRead(ledPin));
}