// LDR Buzzer Alarm

const int ledPin = 13;
const int buzzerPin = 12;
const int ldrPin = A0;
void setup () {
  Serial.begin(9600);
  pinMode(ledPin, OUTPUT);
  pinMode(buzzerPin, OUTPUT);
  pinMode(ldrPin, INPUT);
}
void loop() {
  int ldrStatus = analogRead(ldrPin);  // Read the State of the LDR value.
  if (ldrStatus >= 10) {
    tone(buzzerPin, 100);
    digitalWrite(ledPin, HIGH);
    delay(100);
    noTone(buzzerPin);
    digitalWrite(ledPin, LOW);
    delay(100);
    Serial.println(ldrStatus);
  }
  else {
    noTone(buzzerPin);
    digitalWrite(ledPin, LOW);
    Serial.println(ldrStatus);
  }
}