LCD screen and i2c!

#include <LiquidCrystal_I2C.h>
#include <Wire.h>

LiquidCrystal_I2C lcd(0x3F, 16, 2); //Make (0x3F, 16, 2),to(0x27,20,4) if the lcd screen is not showing anything

void setup() {
  Serial.begin(9600);
  lcd.init();
  lcd.backlight();

}

void loop() {
     lcd.setCursor(0, 0);            //starting position
     lcd.print("Arduino projects");  //Anything you want
     delay(2000);                    //delay 2 seconds
     lcd.clear();                    //clear all 
     lcd.setCursor(0, 0);            //starting position
     lcd.print("# <Your Name>");     //Type your name
     /*delay(2000);
     lcd.clear(); 
     lcd.setCursor(0, 0); 
     lcd.print("Something else"); 
     delay(2000);*/                
}