Connecting LDR (PhotoResistor) with Arduino

int ledPin = 11; // connect LED to digital pin 11
int ldrPin = A0; // connect LDR to analog pin A0
int buzzerPin = 12; // connect buzzer to digital pin 12

void setup() {
  pinMode(buzzerPin, OUTPUT);
  pinMode(ldrPin, INPUT);       // declare buzzer, LED as INPUT and LDR as OUTPUT
  pinMode(ledPin, OUTPUT);
}

void loop() {
  int ldrStatus = analogRead(ldrPin); // connect LDR with Arduino

  if (ldrStatus<=300) { // assign a threshhold value
    digitalWrite(11, HIGH);
    tone(buzzerPin, 4000);
    delay(100);                    // Condition in which, when the threshhold value is bigger and smaller is the value coming from LDR
    digitalWrite(11, LOW);         // then the buzzer will beep and the LED will blink!
    noTone(buzzerPin);
    delay(100);
  }
  else {
    digitalWrite(11, LOW);  // If the value coming from LDR is bigger and smaller is the threshhold value, then the buzzer will not
    noTone(buzzerPin);      // beep and the LED will not blink!
  }
}