How to connect an I2C LCD Display to an Arduino NANO

Schematic diagram

1. Connect the Black jumper cable from the GND pin on the LCD to the GND pin on the NANO
2.  Connect the Red jumper cable from then VCC pin on the LCD to the 5V pin on the NANO
3. Connect the Green jumper cable from the SDA pin on the LCD to the A4 pin on the NANO
4. Connect the Yellow jumper cable from the SCL pin on the LCD to the A5 pin on the NANO

Arduino Sketch

//Compatible with the Arduino IDE 1.0
//Library version:1.1
#include <Wire.h> 
#include <LiquidCrystal_I2C.h>

LiquidCrystal_I2C lcd(0x3F,16,2);  // set the LCD address to 0x27 for a 16 chars and 2 line display

void setup()
  lcd.init();                      // initialize the lcd 
  // Print a message to the LCD.
  lcd.print("Hello, world!");
  lcd.print("Ywrobot Arduino!");
  lcd.print("Arduino LCM IIC 2004");
  lcd.print("Power By Ec-yuan!");

void loop()