#include <Wire.h>
#include <LiquidCrystal_I2C.h>
LiquidCrystal_I2C lcd(0x27, 16, 2);

void setup() {
 pinMode(A0, INPUT);
 pinMode(10, OUTPUT);
 Serial.begin(9600);
 lcd.init();
 lcd.backlight();
 delay(1000);
 lcd.clear();
 delay(1000);
 lcd.setCursor(0, 0);
 lcd.print("Initializing...");
 delay(1000);
 pinMode(13, OUTPUT);
}

void loop() {
 int ldr = analogRead(A0);
 int brightness = map(ldr, 0, 1023, 100, 0);
 Serial.println(brightness);
 lcd.clear();
 lcd.setCursor(0, 0);
 lcd.print("Light: ");
 lcd.print(brightness);
 lcd.print("%");
 delay(3000);
 if(brightness>=25){
  digitalWrite(13, LOW);
 }
 else{
  digitalWrite(13, HIGH);
 }
}