Arduino Laser Tripwire

/********************************************************
 *                 Arduino For Kids: Tripwire Alarm     *
 *                 Learnelectronics Sept. 2023 (C)      *
 *          https://www.youtube.com/learnelectronics    *
 ********************************************************/

const int buttonPin = 2;  // Input pin for the button
const int ledPin = 6;     // Output pin for the LED
const int tonePin = 3;    // Output pin for the tone

bool alarmActive = false;  // Flag to track the alarm state

void setup() {
  pinMode(buttonPin, INPUT_PULLUP);  // Set button pin as input with internal pull-up resistor
  pinMode(ledPin, OUTPUT);
  pinMode(tonePin, OUTPUT);
}

void loop() {
  int buttonState = digitalRead(buttonPin);  // Read the state of the button

  if (buttonState == HIGH) {
    // Button is pressed, activate the alarm
    if (!alarmActive) {
      alarmActive = true;
      digitalWrite(ledPin, HIGH);  // Turn on the LED
      //tone(tonePin, 1000);       // Play a 1 kHz tone
      for (int i = 1000; i <= 1500; i++) {
        tone(tonePin, i);
        delay(5);
  }
}
    }
   else {
    // Button is not pressed, deactivate the alarm
    if (alarmActive) {
      alarmActive = false;
      digitalWrite(ledPin, LOW);  // Turn off the LED
      noTone(tonePin);          // Stop the tone
    }
  }
}