#include <Arduino.h>
#include <Wire.h>


int LDRInput=33; //Set Analog Input A0 for LDR.
int LED=5;
int Buzzer=22; 
void setup() {
Serial.begin(9600);
pinMode(LDRInput,INPUT);
pinMode(LED,OUTPUT);
pinMode(Buzzer,OUTPUT); 
}

void loop() {
int value=analogRead(LDRInput);
Serial.println("LDR value is :");
Serial.println(value);
if(value<300)
  {
    tone(Buzzer,100);
    digitalWrite(LED,HIGH);//The LED turns ON in Dark.
    digitalWrite(Buzzer,HIGH); 
    delay(100); 

  }
  else
  {
    digitalWrite(LED,LOW);//The LED turns OFF in Light.
    noTone(Buzzer);
    digitalWrite(Buzzer,LOW);
    delay(100); 
  }
}