diff --git a/Data/Scripts.rvdata2 b/Data/Scripts.rvdata2
index 96d0583..f5fb114 100644
Binary files a/Data/Scripts.rvdata2 and b/Data/Scripts.rvdata2 differ
diff --git a/Scripts/_.20.rb b/Scripts/_.20.rb
index b709cb9..1cca370 100644
--- a/Scripts/_.20.rb
+++ b/Scripts/_.20.rb
@@ -1,81 +1,54 @@
-#==============================================================================
-# ★ RGSS3-Extension
-# LNX25_ゲーム画面倍率切替
-# 　ゲーム中、F5 キーでゲーム画面の表示倍率を切り替えます。
-#
-# 　version   : 1.00 (12/02/27)
-# 　author    : ももまる
-# 　reference : [url]http://peachround.blog.fc2.com/blog-entry-20.html[/url]
-#
-#==============================================================================
-
 module LNX25
   #--------------------------------------------------------------------------
   # ● 切替キー
   #--------------------------------------------------------------------------
   RESIZE_KEY = :F5 # 規定値: :F5
+  ZOOM_LEVELS = [1.0, 1.5, 2.0, 2.7] # 追加可能な倍率
 end
 
-#==============================================================================
-# ■ LNXスクリプト導入情報
-#==============================================================================
-$lnx_include = {} if $lnx_include == nil
-$lnx_include[:lnx25] = 100 # version
-p "OK:LNX25_ウィンドウサイズ変更"
-
-#==============================================================================
-# ■ Graphics
-#==============================================================================
 module Graphics
-  @screen_zoom = 1
-  #--------------------------------------------------------------------------
-  # ● ゲーム画面の表示倍率取得
-  #--------------------------------------------------------------------------
+  @zoom_index = 0
+  @screen_zoom = 1.0
+  
   def self.screen_zoom
     @screen_zoom
   end
-  #--------------------------------------------------------------------------
-  # ● ゲーム画面の表示倍率変更
-  #--------------------------------------------------------------------------
+  
   def self.screen_zoom=(rate)
     self.rgssplayer_resize(rate)
     @screen_zoom = rate
   end
-  #--------------------------------------------------------------------------
-  # ● ウィンドウハンドルの取得(Win32API)
-  #--------------------------------------------------------------------------
+
+  def self.next_zoom_level
+    @zoom_index = (@zoom_index + 1) % LNX25::ZOOM_LEVELS.size
+    self.screen_zoom = LNX25::ZOOM_LEVELS[@zoom_index]
+  end
+
   def self.rgssplayer
     Win32API.new("user32", "FindWindow", "pp", "i").call("RGSS Player", 0)
   end
-  #--------------------------------------------------------------------------
-  # ● ウィンドウのリサイズ(Win32API)
-  #--------------------------------------------------------------------------
+  
   def self.rgssplayer_resize(rate)
     move_w = Win32API.new("user32", "MoveWindow", "liiiil", "l")
     get_sm = Win32API.new("user32", "GetSystemMetrics", "i", "i")
-    # サイズ計算
-    frame_w   = get_sm.call(7) * 2 # ウィンドウ枠(横方向)
-    frame_h   = get_sm.call(8) * 2 # ウィンドウ枠(縦方向)
-    caption_h = get_sm.call(4)     # タイトルバーの高さ
+    frame_w   = get_sm.call(7) * 2 
+    frame_h   = get_sm.call(8) * 2 
+    caption_h = get_sm.call(4)     
     width  = self.width  * rate + frame_w
     height = self.height * rate + frame_h + caption_h
     x = (get_sm.call(0) - width ) / 2
     y = (get_sm.call(1) - height) / 2
-    # ウィンドウ位置・サイズ変更(ウィンドウ, X, Y, 幅, 高さ, 更新フラグ)
     move_w.call(self.rgssplayer, x, y, width, height, 1)
   end
 end
+
 class << Graphics
-  #--------------------------------------------------------------------------
-  # ● フレーム更新
-  #--------------------------------------------------------------------------
   alias :lnx25_update :update
   def update
-    # 元のメソッドを呼ぶ
     lnx25_update
-    # F5 キーが押されたらリサイズ
     if Input.trigger?(LNX25::RESIZE_KEY)
-      self.screen_zoom = (self.screen_zoom == 1 ? 1.5 : 1) 
+      self.next_zoom_level
+      p "Zoom changed to #{Graphics.screen_zoom}" # Debugging output
     end
   end
-end
\ No newline at end of file
+end