【小白】请问一下这个新菜单项目脚本如何实现翻页？

rr302788751

ALL = 3
TEXT0 = "XXXX"
TEXT1 = "XXXXX"
TEXT2 = "XXX"
class Scene_Title < Scene_Base
  alias ccw create_command_window
  def create_command_window
    ccw
    @command_window.set_handler(:cy, method(:ccy))
  end
  def ccy
    SceneManager.call(S_Cy)
  end
end
class Window_TitleCommand < Window_Command
  alias mcl make_command_list
  def make_command_list
    mcl
    add_command("人物介绍", :cy)
  end
end
class S_Cy < Scene_MenuBase
  def start
    super
    @cy_window = W_Cy.new
    @cy_window.set_handler(:cancel,   method(:return_scene))
  end
end
class W_Cy < Window_Selectable
  def initialize
    super(0, 0, Graphics.width, Graphics.height)
    refresh
    activate
  end
  def refresh
    contents.clear
    ALL.times do |i|
    draw_text(0, 0+i*24, width, line_height, eval("TEXT"+i.to_s))
    end
  end
end


就是这样。超过14行后就看不到了，然后就卡掉了。如何翻页呢？？QWQ
这个脚本是我网上找的，所以不太懂。。