c# - コード ビハインド WPF アニメーションが完了するまで待ちます

Question

RoboZZleのようなアプリケーションを構築していますが、問題があります:(答えのプログラミング言語は重要ではありません: C# または VB.NET) コードビハインドには次のような 3 つのアニメーションがあります:

Private Sub btngo_Click(sender As Object, e As RoutedEventArgs) Handles btngo.Click
        go_stright()
        go_stright()
        go_stright()
        go_stright()
End Sub
Private Sub go_stright()
        Dim da As New DoubleAnimation()
        Dim tt As New TranslateTransform()
        da.From = offsety
        offsety -= 50
        da.To = offsety
        da.Duration = New Duration(TimeSpan.FromSeconds(1))
        tt.BeginAnimation(TranslateTransform.YProperty, da)
End Sub

これが問題です。「btngo」ボタンをクリックすると、最後のアニメーション (4 番目の go_stright) にアニメーション効果があります。次のアニメーションが始まる前に、1 つのアニメーションが完了するまで待つ必要があります。
これどうやってするの？
注: roboZZle では、アルゴリズムを使用するユーザーがスプライトを移動先に移動しますが、スプライトの移動は事前定義されていません。
私はWPFの初心者です。
更新:ストーリー ボードはありません。
更新 2 :私の XAML:

<Page x:Class="Level1"
      xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
      xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
      xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006" 
      xmlns:d="http://schemas.microsoft.com/expression/blend/2008" 
      mc:Ignorable="d" 
      d:DesignHeight="300" d:DesignWidth="300"
      Title="Level1" Width="794" Height="535" Loaded="Page_Loaded_1">
    <Grid>
        <Grid.ColumnDefinitions>
            <ColumnDefinition Width="735*"/>
            <ColumnDefinition Width="69*"/>
        </Grid.ColumnDefinitions>
        <Grid.RowDefinitions>
            <RowDefinition/>
            <RowDefinition Height="65"/>
        </Grid.RowDefinitions>
        <Button x:Name="m1" Content="" HorizontalAlignment="Left" Grid.Row="1" VerticalAlignment="Top" Width="54" Height="54" Margin="10,0,0,0">
            <Button.Background>
                <SolidColorBrush Color="White"/>
            </Button.Background>
        </Button>
        <Button x:Name="m2" Content="" HorizontalAlignment="Left" Grid.Row="1" VerticalAlignment="Top" Width="54" Height="54" Margin="69,1,0,0">
            <Button.Background>
                <SolidColorBrush Color="{DynamicResource {x:Static SystemColors.ControlLightLightColorKey}}"/>
            </Button.Background>
        </Button>
        <Button x:Name="m3" Content="" HorizontalAlignment="Left" Grid.Row="1" VerticalAlignment="Top" Width="54" Height="54" Margin="128,1,0,0">
            <Button.Background>
                <SolidColorBrush Color="{DynamicResource {x:Static SystemColors.ControlLightLightColorKey}}"/>
            </Button.Background>
        </Button>
        <Button x:Name="m4" Content="" HorizontalAlignment="Left" Grid.Row="1" VerticalAlignment="Top" Width="54" Height="54" Margin="187,1,0,0">
            <Button.Background>
                <SolidColorBrush Color="{DynamicResource {x:Static SystemColors.ControlLightLightColorKey}}"/>
            </Button.Background>
        </Button>
        <Button x:Name="m5" Content="" HorizontalAlignment="Left" Grid.Row="1" VerticalAlignment="Top" Width="54" Height="54" Margin="246,0,0,0">
            <Button.Background>
                <SolidColorBrush Color="{DynamicResource {x:Static SystemColors.ControlLightLightColorKey}}"/>
            </Button.Background>
        </Button>
        <Button x:Name="m6" Content="" HorizontalAlignment="Left" Grid.Row="1" VerticalAlignment="Top" Width="54" Height="54" Margin="305,0,0,0">
            <Button.Background>
                <SolidColorBrush Color="White"/>
            </Button.Background>
        </Button>
        <Rectangle HorizontalAlignment="Left" Height="50" Margin="215,100,0,0" VerticalAlignment="Top" Width="50">
            <Rectangle.Stroke>
                <SolidColorBrush Color="{DynamicResource {x:Static SystemColors.HighlightColorKey}}"/>
            </Rectangle.Stroke>
            <Rectangle.Fill>
                <ImageBrush ImageSource="Images/l1khoone.png" Stretch="None"/>
            </Rectangle.Fill>
        </Rectangle>
        <Rectangle HorizontalAlignment="Left" Height="50" Margin="215,149,0,0" VerticalAlignment="Top" Width="50">
            <Rectangle.Stroke>
                <SolidColorBrush Color="{DynamicResource {x:Static SystemColors.HighlightColorKey}}"/>
            </Rectangle.Stroke>
            <Rectangle.Fill>
                <ImageBrush ImageSource="Images/l1khoone.png" Stretch="None"/>
            </Rectangle.Fill>
        </Rectangle>
        <Rectangle HorizontalAlignment="Left" Height="50" Margin="215,199,0,0" VerticalAlignment="Top" Width="50">
            <Rectangle.Stroke>
                <SolidColorBrush Color="{DynamicResource {x:Static SystemColors.HighlightColorKey}}"/>
            </Rectangle.Stroke>
            <Rectangle.Fill>
                <ImageBrush ImageSource="Images/l1khoone.png" Stretch="None"/>
            </Rectangle.Fill>
        </Rectangle>
        <Rectangle HorizontalAlignment="Left" Height="50" Margin="215,249,0,0" VerticalAlignment="Top" Width="50">
            <Rectangle.Stroke>
                <SolidColorBrush Color="{DynamicResource {x:Static SystemColors.HighlightColorKey}}"/>
            </Rectangle.Stroke>
            <Rectangle.Fill>
                <ImageBrush ImageSource="Images/l1khoone.png" Stretch="None"/>
            </Rectangle.Fill>
        </Rectangle>
        <Rectangle HorizontalAlignment="Left" Height="50" Margin="215,299,0,0" VerticalAlignment="Top" Width="50">
            <Rectangle.Stroke>
                <SolidColorBrush Color="{DynamicResource {x:Static SystemColors.HighlightColorKey}}"/>
            </Rectangle.Stroke>
            <Rectangle.Fill>
                <ImageBrush ImageSource="Images/l1khoone.png" Stretch="None"/>
            </Rectangle.Fill>
        </Rectangle>
        <Rectangle HorizontalAlignment="Left" Height="50" Margin="264,299,0,0" VerticalAlignment="Top" Width="50">
            <Rectangle.Stroke>
                <SolidColorBrush Color="{DynamicResource {x:Static SystemColors.HighlightColorKey}}"/>
            </Rectangle.Stroke>
            <Rectangle.Fill>
                <ImageBrush ImageSource="Images/l1khoone.png" Stretch="None"/>
            </Rectangle.Fill>
        </Rectangle>
        <Rectangle HorizontalAlignment="Left" Height="50" Margin="314,299,0,0" VerticalAlignment="Top" Width="50">
            <Rectangle.Stroke>
                <SolidColorBrush Color="{DynamicResource {x:Static SystemColors.HighlightColorKey}}"/>
            </Rectangle.Stroke>
            <Rectangle.Fill>
                <ImageBrush ImageSource="Images/l1khoone.png" Stretch="None"/>
            </Rectangle.Fill>
        </Rectangle>
        <Rectangle HorizontalAlignment="Left" Height="50" Margin="364,299,0,0" VerticalAlignment="Top" Width="50">
            <Rectangle.Stroke>
                <SolidColorBrush Color="{DynamicResource {x:Static SystemColors.HighlightColorKey}}"/>
            </Rectangle.Stroke>
            <Rectangle.Fill>
                <ImageBrush ImageSource="Images/l1khoone.png" Stretch="None"/>
            </Rectangle.Fill>
        </Rectangle>
        <Rectangle HorizontalAlignment="Left" Height="50" Margin="413,299,0,0" VerticalAlignment="Top" Width="50">
            <Rectangle.Stroke>
                <SolidColorBrush Color="{DynamicResource {x:Static SystemColors.HighlightColorKey}}"/>
            </Rectangle.Stroke>
            <Rectangle.Fill>
                <ImageBrush ImageSource="Images/l1khoone.png" Stretch="None"/>
            </Rectangle.Fill>
        </Rectangle>
        <Rectangle HorizontalAlignment="Left" Height="50" Margin="413,100,0,0" VerticalAlignment="Top" Width="50">
            <Rectangle.Stroke>
                <SolidColorBrush Color="{DynamicResource {x:Static SystemColors.HighlightColorKey}}"/>
            </Rectangle.Stroke>
            <Rectangle.Fill>
                <ImageBrush ImageSource="Images/l1khoone.png" Stretch="None"/>
            </Rectangle.Fill>
        </Rectangle>
        <Rectangle HorizontalAlignment="Left" Height="50" Margin="413,149,0,0" VerticalAlignment="Top" Width="50">
            <Rectangle.Stroke>
                <SolidColorBrush Color="{DynamicResource {x:Static SystemColors.HighlightColorKey}}"/>
            </Rectangle.Stroke>
            <Rectangle.Fill>
                <ImageBrush ImageSource="Images/l1khoone.png" Stretch="None"/>
            </Rectangle.Fill>
        </Rectangle>
        <Rectangle HorizontalAlignment="Left" Height="50" Margin="413,199,0,0" VerticalAlignment="Top" Width="50">
            <Rectangle.Stroke>
                <SolidColorBrush Color="{DynamicResource {x:Static SystemColors.HighlightColorKey}}"/>
            </Rectangle.Stroke>
            <Rectangle.Fill>
                <ImageBrush ImageSource="Images/l1khoone.png" Stretch="None"/>
            </Rectangle.Fill>
        </Rectangle>
        <Rectangle HorizontalAlignment="Left" Height="50" Margin="413,249,0,0" VerticalAlignment="Top" Width="50">
            <Rectangle.Stroke>
                <SolidColorBrush Color="{DynamicResource {x:Static SystemColors.HighlightColorKey}}"/>
            </Rectangle.Stroke>
            <Rectangle.Fill>
                <ImageBrush ImageSource="Images/l1khoone.png" Stretch="None"/>
            </Rectangle.Fill>
        </Rectangle>
        <Rectangle HorizontalAlignment="Left" Height="50" Margin="264,100,0,0" VerticalAlignment="Top" Width="50">
            <Rectangle.Stroke>
                <SolidColorBrush Color="{DynamicResource {x:Static SystemColors.HighlightColorKey}}"/>
            </Rectangle.Stroke>
            <Rectangle.Fill>
                <ImageBrush ImageSource="Images/l1khoone.png" Stretch="None"/>
            </Rectangle.Fill>
        </Rectangle>
        <Rectangle HorizontalAlignment="Left" Height="50" Margin="314,100,0,0" VerticalAlignment="Top" Width="50">
            <Rectangle.Stroke>
                <SolidColorBrush Color="{DynamicResource {x:Static SystemColors.HighlightColorKey}}"/>
            </Rectangle.Stroke>
            <Rectangle.Fill>
                <ImageBrush ImageSource="Images/l1khoone.png" Stretch="None"/>
            </Rectangle.Fill>
        </Rectangle>
        <Rectangle HorizontalAlignment="Left" Height="50" Margin="364,100,0,0" VerticalAlignment="Top" Width="50">
            <Rectangle.Stroke>
                <SolidColorBrush Color="{DynamicResource {x:Static SystemColors.HighlightColorKey}}"/>
            </Rectangle.Stroke>
            <Rectangle.Fill>
                <ImageBrush ImageSource="Images/l1khoone.png" Stretch="None"/>
            </Rectangle.Fill>
        </Rectangle>
        <Ellipse x:Name="g1" HorizontalAlignment="Left" Height="25" Margin="228,313,0,0" VerticalAlignment="Top" Width="25">
            <Ellipse.Fill>
                <RadialGradientBrush>
                    <GradientStop Color="#FF005DFF" Offset="0"/>
                    <GradientStop Color="Red" Offset="1"/>
                </RadialGradientBrush>
            </Ellipse.Fill>
        </Ellipse>
        <Button Content="" x:Name="btnup" HorizontalAlignment="Center" Width="54" Height="54" FlowDirection="RightToLeft" Margin="721,48,19,0" HorizontalContentAlignment="Center" VerticalContentAlignment="Center" VerticalAlignment="Top" Grid.ColumnSpan="2">
            <Button.Foreground>
                <ImageBrush ImageSource="Images/up.jpg" Stretch="None">
                    <ImageBrush.RelativeTransform>
                        <TransformGroup>
                            <ScaleTransform CenterY="0.5" CenterX="0.5"/>
                            <SkewTransform CenterY="0.5" CenterX="0.5"/>
                            <RotateTransform CenterY="0.5" CenterX="0.5"/>
                            <TranslateTransform/>
                        </TransformGroup>
                    </ImageBrush.RelativeTransform>
                </ImageBrush>
            </Button.Foreground>
            <Button.Background>
                <ImageBrush ImageSource="Images/up.jpg"/>
            </Button.Background>

        </Button>
        <Button Content="" x:Name="btnleft" HorizontalAlignment="Center" Width="54" Height="54" Margin="721,107,19,0" HorizontalContentAlignment="Center" VerticalContentAlignment="Center" VerticalAlignment="Top" Grid.ColumnSpan="2">
            <Button.Foreground>
                <ImageBrush ImageSource="Images/up.jpg" Stretch="None"/>
            </Button.Foreground>
            <Button.Background>
                <ImageBrush ImageSource="Images/left.jpg"/>
            </Button.Background>

        </Button>
        <Button Content="" x:Name="btnright" HorizontalAlignment="Center" Width="54" Height="54" Margin="721,166,19,0" HorizontalContentAlignment="Center" VerticalContentAlignment="Center" VerticalAlignment="Top" Grid.ColumnSpan="2">
            <Button.Foreground>
                <ImageBrush ImageSource="Images/up.jpg" Stretch="None"/>
            </Button.Foreground>
            <Button.Background>
                <ImageBrush ImageSource="Images/Right.jpg"/>
            </Button.Background>

        </Button>
        <Button Content="" x:Name="btnf1" HorizontalAlignment="Center" Width="54" Height="54" Margin="721,225,19,0" HorizontalContentAlignment="Center" VerticalContentAlignment="Center" VerticalAlignment="Top" Grid.ColumnSpan="2">
            <Button.Foreground>
                <ImageBrush ImageSource="Images/up.jpg" Stretch="None"/>
            </Button.Foreground>
            <Button.Background>
                <ImageBrush ImageSource="Images/F1.jpg"/>
            </Button.Background>

        </Button>
        <Button Content="" x:Name="btnf2" HorizontalAlignment="Center" Width="54" Height="54" Margin="721,284,19,0" HorizontalContentAlignment="Center" VerticalContentAlignment="Center" VerticalAlignment="Top" Grid.ColumnSpan="2" IsEnabled="False">
            <Button.Foreground>
                <ImageBrush ImageSource="Images/up.jpg" Stretch="None"/>
            </Button.Foreground>
            <Button.Background>
                <ImageBrush ImageSource="Images/F2.jpg"/>
            </Button.Background>

        </Button>
        <Button Content="GO!" x:Name="btngo" HorizontalAlignment="Center" Width="54" Height="54" Margin="721,343,19,0" Background="Red" Foreground="White" FontFamily="Meiryo" FontSize="19" FontWeight="Bold" HorizontalContentAlignment="Center" VerticalContentAlignment="Center" VerticalAlignment="Top" Grid.ColumnSpan="2"/>
        <Button Content="Reset" x:Name="btnreset" HorizontalAlignment="Center" Width="54" Height="54" Margin="721,402,19,0" Foreground="White" FontFamily="Meiryo" FontSize="16" FontWeight="Bold" Background="Cyan" HorizontalContentAlignment="Center" VerticalContentAlignment="Center" VerticalAlignment="Top" Grid.ColumnSpan="2"/>
        <Ellipse x:Name="g2" HorizontalAlignment="Left" Height="25" Margin="427,313,0,0" VerticalAlignment="Top" Width="25">
            <Ellipse.Fill>
                <RadialGradientBrush>
                    <GradientStop Color="#FF005DFF" Offset="0"/>
                    <GradientStop Color="Red" Offset="1"/>
                </RadialGradientBrush>
            </Ellipse.Fill>
        </Ellipse>
        <Ellipse x:Name="g3" HorizontalAlignment="Left" Height="25" Margin="427,112,0,0" VerticalAlignment="Top" Width="25">
            <Ellipse.Fill>
                <RadialGradientBrush>
                    <GradientStop Color="#FF005DFF" Offset="0"/>
                    <GradientStop Color="Red" Offset="1"/>
                </RadialGradientBrush>
            </Ellipse.Fill>
        </Ellipse>
        <Image x:Name="sprite" Margin="215,100,461,320" Source="Images/downsprite.png" RenderTransformOrigin="0.5,0.5">
            <Image.RenderTransform>
                <TransformGroup>
                    <ScaleTransform/>
                    <SkewTransform/>
                    <RotateTransform/>
                    <TranslateTransform/>
                </TransformGroup>
            </Image.RenderTransform>
        </Image>
    </Grid>
</Page>