#include <Servo.h>
#include <Wire.h>
#include <LiquidCrystal_I2C.h>
LiquidCrystal_I2C lcd(0x27,16,2);
int ldrsensor=A0;
int ledpin=3;
int buzzer =4;
Servo pic;
void setup(){
  pic.attach(10);
  pinMode(buzzer,OUTPUT);
  pinMode(ledpin,OUTPUT);
  pinMode(ldrsensor,INPUT);
  lcd.init();
  lcd.backlight();
  lcd.setCursor(0,0);
  lcd.print("LIGHT SYSTEM");
  delay(2000);
  lcd.clear();
}
void loop(){
  pic.write(90);
  int ldrvalue=analogRead(A0);
  int ldrpercent=map(ldrvalue,0,1023,0,100);
  lcd.setCursor(0,0);
  lcd.print(ldrpercent);
  if(ldrvalue<=500){
    digitalWrite(ledpin,HIGH);
    lcd.setCursor(0,1);
  lcd.print("LIGHT ON:");
  delay(2000);
      tone(buzzer,1000);
      delay(1000);
noTone(buzzer);
  }
  else{
    pic.write(0);
      digitalWrite(ledpin,LOW);
      digitalWrite(buzzer,LOW);
    lcd.setCursor(0,1);
  lcd.print("LIGHT OFF:");
  }
  delay(1000);
}