int green = 13;
int red = 12;
int buzzer = 11;
int ldr = A0;

void setup() {
  // put your setup code here, to run once:
  Serial.begin(9600);
  pinMode(green, OUTPUT);
  pinMode(red, OUTPUT);
  pinMode(buzzer, OUTPUT);
  pinMode(ldr, INPUT);

}

void loop() {
  // put your main code here, to run repeatedly:
  int ldrstatus = analogRead(ldr);
  if(ldrstatus >= 500){
    tone(buzzer,100);
    digitalWrite(green, HIGH);
    delay(100);
    noTone(buzzer);
    digitalWrite(green, LOW);
    delay(100);
    digitalWrite(red, LOW);

    Serial.println("--------Alarm Activated--------");
  }
  else{
    noTone(buzzer);
    digitalWrite(red, HIGH);
    Serial.println("--------Alarm Deactivated--------");
  }

}