LCD 2004 I2C xmas message

lcd_xmas.ino

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

/* If address is not 0x27, then try 0x3F */
LiquidCrystal_I2C lcd(0x27,20,4);

/* Custom characters */
byte c0[8] = {0x00,0x00,0x00,0x00,0x01,0x03,0x07,0x0F};
byte c1[8] = {0x04,0x0E,0x1F,0x1F,0x1F,0x1F,0x1F,0x1F};
byte c2[8] = {0x00,0x00,0x00,0x00,0x10,0x18,0x1C,0x1E};
byte c3[8] = {0x01,0x03,0x07,0x0F,0x1F,0x00,0x00,0x00};
byte c4[8] = {0x1F,0x1F,0x1F,0x1F,0x1F,0x1F,0x1F,0x1F};
byte c5[8] = {0x10,0x18,0x1C,0x1E,0x1F,0x00,0x00,0x00};
// Star
byte c6[8] = {0x00,0x00,0x15,0x0E,0x1F,0x0E,0x15,0x04}; 
// Spanish exclamation mark
byte ex[8] = {0x00,0x04,0x00,0x00,0x04,0x04,0x04,0x04}; 

void setup() {
  lcd.init();
  
  lcd.createChar(0, c0);
  lcd.createChar(1, c1);
  lcd.createChar(2, c2);
  lcd.createChar(3, c3);
  lcd.createChar(4, c4);
  lcd.createChar(5, c5);
  lcd.createChar(6, c6);
  lcd.createChar(7, ex);

  /*Draw left tree*/
  lcd.setCursor(1,0);
  lcd.write(byte(6));
  lcd.setCursor(0,1);
  lcd.write(byte(0));
  lcd.write(byte(1));
  lcd.write(byte(2));
  lcd.setCursor(0,2);
  lcd.write(byte(3));
  lcd.write(byte(4));
  lcd.write(byte(5));

  /* Draw right tree */
  lcd.setCursor(18,0);
  lcd.write(byte(6));
  lcd.setCursor(17,1);
  lcd.write(byte(0));
  lcd.write(byte(1));
  lcd.write(byte(2));
  lcd.setCursor(17,2);
  lcd.write(byte(3));
  lcd.write(byte(4));
  lcd.write(byte(5));

  /* Draw central text */
  lcd.setCursor(6,1);
  lcd.write(byte(7));
  lcd.print("Feliz");
  lcd.setCursor(6,2);
  lcd.print("Navidad!");
}

void loop() {
  /* Turn on and off lcd backlight with random frequency */
  lcd.backlight();  
  delay(random(500, 3000));
  lcd.noBacklight();  
  delay(random(500, 3000));
}