// LDR sensor - using LCD(I2C)

#include <LiquidCrystal_I2C.h>

LiquidCrystal_I2C lcd = LiquidCrystal_I2C(0x27,16,2);

void setup() {
  lcd.init();
  pinMode(3, OUTPUT);
  pinMode(4, OUTPUT);
}

void loop() {
  // we should read the value
  int ldrVal = analogRead(A0);
  lcd.println(ldrVal);
  delay(200);

  if (ldrVal < 80) {
    analogWrite(3, 255);
  } else {
    analogWrite(3, 0);
  }

  if (ldrVal > 80) {
    analogWrite(4, 255);
  } else {
    analogWrite(4, 0);
  }
}