#include <LiquidCrystal_I2C.h>

LiquidCrystal_I2C lcd(0x27,16,2);

int led1 = 7;
int led2 = 6;

int led3 = 12;
int btn = 13;

void setup() {
  lcd.init();
  lcd.backlight();

  pinMode(led1, OUTPUT);
  pinMode(led2, OUTPUT);

  pinMode(led3, OUTPUT);
  pinMode(btn, INPUT_PULLUP);
}

void loop() {
  int ldrVal = analogRead(A0);
  lcd.println(ldrVal);
  delay(200);

  if(ldrVal<80)
  {
    analogWrite(led1, 255);
  }else{
    analogWrite(led1, 0);
  }

  if(ldrVal>80)
  {
    analogWrite(led2, 255);
  }else{
    analogWrite(led2, 0);
  }

  int btnVal = digitalRead(btn);
  if(btnVal == HIGH)
  {
    digitalWrite(led3, LOW);
  }else{
    digitalWrite(led3, HIGH);
  }

}