Button Checker

#include <Wire.h> 
#include <LiquidCrystal_I2C.h>
LiquidCrystal_I2C lcd(0x27,16,2);  //sometimes the LCD adress is not 0x27. Change to 0x3f if it doesn't work.

void setup() {
  lcd.init();                 //Init the LCD
  lcd.backlight();            //Activate backlight     

  lcd.print("BUTTON");        //Intro   
  lcd.setCursor(0, 1);
  lcd.print("CHECK");
  delay(3000);    
}

void loop() {
  lcd.clear();
  lcd.print("VALUE:");      
  lcd.print(digitalRead(4));  //The value of the button
  delay(300);  
}