#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);
}

void loop() {
  int ldr = analogRead(A0);
  int brightness = map(ldr, 0, 1023, 100, 0);

  Serial.print("Brightness: ");
  Serial.print(brightness);
  Serial.println("%");

  lcd.clear();
  lcd.setCursor(0, 0);
  lcd.print("Light: ");
  lcd.print(brightness);
  lcd.print("%");

  if (brightness < 25) {
    digitalWrite(10, HIGH);
  } else {
    digitalWrite(10, LOW);
  }

  delay(3000);
}