diff --git a/OpenLyricsClient/App.axaml b/OpenLyricsClient/App.axaml
index 3caa7d0..031a675 100644
--- a/OpenLyricsClient/App.axaml
+++ b/OpenLyricsClient/App.axaml
@@ -3,7 +3,8 @@
              xmlns:themes="clr-namespace:Material.Styles.Themes;assembly=Material.Styles"
              xmlns:local="using:OpenLyricsClient"
              xmlns:converter="clr-namespace:OpenLyricsClient.Backend.Utils.Converter"
-            
+             xmlns:system="clr-namespace:System;assembly=System.Runtime"
+
              x:Class="OpenLyricsClient.App">
     <Application.DataTemplates>
         <local:ViewLocator/>
@@ -39,11 +40,44 @@
         <Style>
             
             <Style.Resources>
-                <SolidColorBrush x:Key="PrimaryThemeColorBrush" Color="#dc143c"></SolidColorBrush>
-                <SolidColorBrush x:Key="SecondaryThemeColorBrush" Color="#dc143c"></SolidColorBrush>
-                <SolidColorBrush x:Key="PrimaryThemeFontColorBrush" Color="#FFFFFF"></SolidColorBrush>
-                <SolidColorBrush x:Key="SecondaryThemeFontColorBrush" Color="#FFFFFF"></SolidColorBrush>
-                <SolidColorBrush x:Key="LightThemeFontColorBrush" Color="#FFFFFF"></SolidColorBrush>
+                
+                <SolidColorBrush x:Key="PrimaryThemeColorBrush" Color="#dc143c">
+                    <SolidColorBrush.Transitions>
+                        <Transitions>
+                            <ColorTransition Property="Color" Duration="0:0:0.5" Easing="LinearEasing"/>
+                        </Transitions>
+                    </SolidColorBrush.Transitions>
+                </SolidColorBrush>
+                
+                <SolidColorBrush x:Key="SecondaryThemeColorBrush" Color="#dc143c">
+                    <SolidColorBrush.Transitions>
+                        <Transitions>
+                            <ColorTransition Property="Color" Duration="0:0:0.5" Easing="CircularEaseOut"/>
+                        </Transitions>
+                    </SolidColorBrush.Transitions>
+                </SolidColorBrush>
+                
+                <SolidColorBrush x:Key="PrimaryThemeFontColorBrush" Color="#FFFFFF">
+                    <SolidColorBrush.Transitions>
+                        <Transitions>
+                            <ColorTransition Property="Color" Duration="0:0:0.5" Easing="CircularEaseOut"/>
+                        </Transitions>
+                    </SolidColorBrush.Transitions>
+                </SolidColorBrush>
+                <SolidColorBrush x:Key="SecondaryThemeFontColorBrush" Color="#FFFFFF">
+                    <SolidColorBrush.Transitions>
+                        <Transitions>
+                            <ColorTransition Property="Color" Duration="0:0:0.5" Easing="CircularEaseOut"/>
+                        </Transitions>
+                    </SolidColorBrush.Transitions>
+                </SolidColorBrush>
+                <SolidColorBrush x:Key="LightThemeFontColorBrush" Color="#FFFFFF">
+                    <SolidColorBrush.Transitions>
+                        <Transitions>
+                            <ColorTransition Property="Color" Duration="0:0:0.5" Easing="CircularEaseOut"/>
+                        </Transitions>
+                    </SolidColorBrush.Transitions>
+                </SolidColorBrush>
                 
                 <SolidColorBrush x:Key="SelectedLineFontColorBrush" Color="#FFFFFF"></SolidColorBrush>
                 <SolidColorBrush x:Key="UnSelectedLineFontColorBrush" Color="#FFFFFF"></SolidColorBrush>
diff --git a/OpenLyricsClient/Backend/Handler/Artwork/ArtworkHandler.cs b/OpenLyricsClient/Backend/Handler/Artwork/ArtworkHandler.cs
index 4f753cb..c723c24 100644
--- a/OpenLyricsClient/Backend/Handler/Artwork/ArtworkHandler.cs
+++ b/OpenLyricsClient/Backend/Handler/Artwork/ArtworkHandler.cs
@@ -87,7 +87,7 @@ private void OnArtworkFoundHandler(object sender, ArtworkFoundEventArgs args)
                 }
 
                 color.Color = args.Artwork.ArtworkColor;
-                secondaryColor!.Color = args.Artwork.DarkArtworkColor;
+                secondaryColor.Color = args.Artwork.DarkArtworkColor;
 
                 byte light = 120;
                 byte primary = 22;
diff --git a/OpenLyricsClient/Frontend/View/Custom/NewLyricsScroller.axaml b/OpenLyricsClient/Frontend/View/Custom/NewLyricsScroller.axaml
index 94fe90b..ae63dc2 100644
--- a/OpenLyricsClient/Frontend/View/Custom/NewLyricsScroller.axaml
+++ b/OpenLyricsClient/Frontend/View/Custom/NewLyricsScroller.axaml
@@ -5,8 +5,6 @@
              xmlns:custom="clr-namespace:OpenLyricsClient.Frontend.Models.Custom"
              xmlns:elements="clr-namespace:OpenLyricsClient.Frontend.Models.Elements"
              mc:Ignorable="d" d:DesignWidth="800" d:DesignHeight="450"
-             Height="700"
-             Bounds="0,0,0,700"
              x:Class="OpenLyricsClient.Frontend.View.Custom.NewLyricsScroller">
     
     <UserControl.DataContext>
@@ -15,7 +13,7 @@
     
     <Grid Background="{DynamicResource PrimaryThemeColorBrush}">
         <custom:CustomScrollViewer Name="CTRL_Viewer">
-            <Panel>
+            <Panel Name="CTRL_Container">
                 <ItemsRepeater Name="HIDDEN_CTRL_Repeater"
                                Items="{Binding Lyrics}"
                                IsVisible="False">
@@ -48,8 +46,7 @@
                     </ItemsRepeater.ItemTemplate>
                     <ItemsRepeater.Transitions>
                         <Transitions>
-                            <ThicknessTransition Property="Margin" Duration="0:0:1.0" Easing="CubicEaseOut" />
-                            <DoubleTransition Property="Opacity" Duration="0:0:5.0" Easing="CubicEaseOut"></DoubleTransition>
+                            <ThicknessTransition Property="Margin" Duration="0:0:3.0" Easing="LinearEasing"/>
                         </Transitions>
                     </ItemsRepeater.Transitions>
                 </ItemsRepeater>
diff --git a/OpenLyricsClient/Frontend/View/Custom/NewLyricsScroller.axaml.cs b/OpenLyricsClient/Frontend/View/Custom/NewLyricsScroller.axaml.cs
index fe1103d..3019c4d 100644
--- a/OpenLyricsClient/Frontend/View/Custom/NewLyricsScroller.axaml.cs
+++ b/OpenLyricsClient/Frontend/View/Custom/NewLyricsScroller.axaml.cs
@@ -31,6 +31,7 @@ public partial class NewLyricsScroller : UserControl
     private CustomScrollViewer _customScrollViewer;
     private ItemsRepeater _repeater;
     private ItemsRepeater _hiddenRepeater;
+    private Panel _container;
 
     // ViewModel
     private NewLyricsScrollerViewModel _viewModel;
@@ -64,8 +65,8 @@ public NewLyricsScroller()
         
         this._hiddenRepeater = this.Get<ItemsRepeater>(nameof(HIDDEN_CTRL_Repeater));
         this._repeater = this.Get<ItemsRepeater>(nameof(CTRL_Repeater));
-
         this._customScrollViewer = this.Get<CustomScrollViewer>(nameof(CTRL_Viewer));
+        this._container = this.Get<Panel>(nameof(CTRL_Container));
 
         this._uiThreadRenderTimer = new UiThreadRenderTimer(144);
         this._uiThreadRenderTimer.Tick += UiThreadRenderTimerOnTick;
@@ -76,7 +77,7 @@ public NewLyricsScroller()
     private void UiThreadRenderTimerOnTick(TimeSpan obj)
     {
         this._repeater.Margin = GetMargin();
-        
+
         if (this._isSynced)
         {
             double y = SmoothAnimator.Lerp(
@@ -99,10 +100,7 @@ private void SongHandlerOnSongChanged(object sender, SongChangedEventArgs songch
     
         Dispatcher.UIThread.InvokeAsync(() =>
         {
-            if (!DataValidator.ValidateData(this._viewModel.Lyrics, this._viewModel.Lyric))
-                return;
-
-            //this._repeater.Margin = new Thickness(0,2000,0,1000);
+            this._repeater.Margin = GetMargin() * 4;
             
             /*this._repeater.Margin = 
                 new Thickness(0, 
@@ -111,17 +109,15 @@ private void SongHandlerOnSongChanged(object sender, SongChangedEventArgs songch
                         -3000 : 3000, 0, 0);*/
             this._isSynced = false;
             this._customScrollViewer.Offset = new Vector(0, 0);
-            this._repeater.Opacity = 0.0d;
             this._customScrollViewer.VerticalScrollBarVisibility = ScrollBarVisibility.Hidden;
         });
     }
 
     private void LyricHandlerOnLyricsFound(object sender)
     {
-        Dispatcher.UIThread.InvokeAsync(() =>
+        Dispatcher.UIThread.InvokeAsync(async () =>
         {
             this._isSynced = true;
-            this._repeater.Opacity = 1.0d;
             this._customScrollViewer.VerticalScrollBarVisibility = ScrollBarVisibility.Auto;
         });
 
@@ -174,12 +170,9 @@ private double GetRenderedOffset(LyricPart lyricPart, LyricPart[] lyricParts)
         for (int i = 0; i < index; i++)
             position += GetRenderedSize(i).Height;
 
-        double halfHeight = this._customScrollViewer.Bounds.Height / 2;
-        double halfCurrentLineHeight = GetRenderedSize(index).Height / 2;
+        double halfHeight = this._customScrollViewer.Viewport.Height / 2.5d;
 
-        double item = (halfHeight - halfCurrentLineHeight);
-        
-        position -= item;
+        position -= halfHeight;
         position += margin.Top;
 
         return position;
@@ -221,20 +214,13 @@ private Size GetRenderedSize(int index)
 
     public Thickness GetMargin()
     {
-        if (!DataValidator.ValidateData(this._viewModel.Lyrics, this._viewModel.Lyric))
-            return new Thickness();
-        
-        double m = this._customScrollViewer.DesiredSize.Height / 2;
-        
-        /*double up = GetRenderedSize(0).Height / 2;
-        double down = GetRenderedSize(this._viewModel.Lyrics.Length - 1).Height / 2;*/
-
+        double m = this._customScrollViewer.Viewport.Height / 2.5d;
         return new Thickness(0, m, 0, m);
     }
     
     public float CalcSpeed()
     {
-        if (!DataValidator.ValidateData(this._viewModel.Lyrics))
+        if (!(DataValidator.ValidateData(this._viewModel) && DataValidator.ValidateData(this._viewModel.Lyrics)))
             return 15;
 
         LyricPart lastPart = null;