diff --git a/Zframework b/Zframework
index a91c3d67..559a8a46 160000
--- a/Zframework
+++ b/Zframework
@@ -1 +1 @@
-Subproject commit a91c3d67f23a3b06ca38352b864fbd85b4dca6ac
+Subproject commit 559a8a46a79af57893224a2497d3c249dab88025
diff --git a/main.lua b/main.lua
index ecf361de..863f7056 100644
--- a/main.lua
+++ b/main.lua
@@ -180,7 +180,7 @@ Z.setOnFnKeys({
             end
         end
     end,
-    function()print(WIDGET.getSelected()or"no widget selected")end,
+    function()print(BG.locked)end,
     function()for k,v in next,_G do print(k,v)end end,
     function()if love['_openConsole']then love['_openConsole']()end end,
 })
diff --git a/parts/gameFuncs.lua b/parts/gameFuncs.lua
index d3bfadb5..8c847625 100644
--- a/parts/gameFuncs.lua
+++ b/parts/gameFuncs.lua
@@ -165,17 +165,15 @@ do--function applySettings()
             BG.set()
         elseif SETTING.bg=='off'then
             BG.unlock()
-            BG.set('fixColor')
-            BG.send(SETTING.bgAlpha,SETTING.bgAlpha,SETTING.bgAlpha)
+            BG.set('fixColor',SETTING.bgAlpha,SETTING.bgAlpha,SETTING.bgAlpha)
             BG.lock()
         elseif SETTING.bg=='custom'then
             if love.filesystem.getInfo('conf/customBG')then
                 local res,image=pcall(gc.newImage,love.filesystem.newFile('conf/customBG'))
                 if res then
                     BG.unlock()
-                    BG.set('custom')
                     gc.setDefaultFilter('linear','linear')
-                    BG.send(SETTING.bgAlpha,image)
+                    BG.set('custom',SETTING.bgAlpha,image)
                     gc.setDefaultFilter('nearest','nearest')
                     BG.lock()
                 else
@@ -184,8 +182,7 @@ do--function applySettings()
             else--Switch off when custom BG not found
                 SETTING.bg='off'
                 BG.unlock()
-                BG.set('fixColor')
-                BG.send(SETTING.bgAlpha,SETTING.bgAlpha,SETTING.bgAlpha)
+                BG.set('fixColor',SETTING.bgAlpha,SETTING.bgAlpha,SETTING.bgAlpha)
                 BG.lock()
             end
         end
diff --git a/parts/scenes/app_dtw.lua b/parts/scenes/app_dtw.lua
index 7ff5626a..97f36d96 100644
--- a/parts/scenes/app_dtw.lua
+++ b/parts/scenes/app_dtw.lua
@@ -199,8 +199,7 @@ local scene={}
 
 function scene.sceneInit()
     reset()
-    BG.set('fixColor')
-    BG.send(.26,.26,.26)
+    BG.set('fixColor',.26,.26,.26)
     BGM.play(bgm)
 end
 
diff --git a/parts/scenes/app_mahjong.lua b/parts/scenes/app_mahjong.lua
index a25eb008..1b7e625c 100644
--- a/parts/scenes/app_mahjong.lua
+++ b/parts/scenes/app_mahjong.lua
@@ -106,8 +106,7 @@ end
 local scene={}
 
 function scene.sceneInit()
-    BG.set('fixColor')
-    BG.send(.26,.62,.26)
+    BG.set('fixColor',.26,.62,.26)
     _newGame()
     selected=false
 end
diff --git a/parts/scenes/app_tap.lua b/parts/scenes/app_tap.lua
index 0556e0cb..81b0bcc1 100644
--- a/parts/scenes/app_tap.lua
+++ b/parts/scenes/app_tap.lua
@@ -12,8 +12,7 @@ function scene.sceneInit()
     lastKey=nil
     speed=0
     keyTime={}for i=1,40 do keyTime[i]=-1e99 end
-    BG.set('fixColor')
-    BG.send(.26,.26,.26)
+    BG.set('fixColor',.26,.26,.26)
     BGM.play('push')
 end
 
diff --git a/parts/scenes/setting_video.lua b/parts/scenes/setting_video.lua
index 0bf9d95c..5734c3f6 100644
--- a/parts/scenes/setting_video.lua
+++ b/parts/scenes/setting_video.lua
@@ -97,7 +97,14 @@ scene.widgetList={
         },
     WIDGET.newSlider{name='bgAlpha',      x=1020,y=1430,w=200,
         axis={0,.8},disp=SETval('bgAlpha'),
-        code=function(v)SETTING.bgAlpha=v BG.send(v,v,v)end,
+        code=function(v)
+            SETTING.bgAlpha=v
+            if BG.cur=='fixColor' then
+                BG.send(v,v,v)
+            else
+                BG.send(v)
+            end
+        end,
         hideF=function()return SETTING.bg=='on'end
         },