Splash form - two triangles that go from Green to Blue

I need to have the background color for my splash form go from Green (0 to 255) to Blue (255 to 0). I found the code in a previous post but it doesn't work. It still displays what was produced when I tried to make the splash form. The code I used is this:

Private Sub frmSplash_Paint(ByVal sender As Object, ByVal e As System.Windows.Forms.PaintEventArgs) Handles MyBase.Paint

        Dim rect As Rectangle = New Rectangle(20, 20, 200, 100)
        Dim path As GraphicsPath
        Dim region As Region
        Dim brush As LinearGradientBrush

        path = New GraphicsPath(FillMode.Alternate)
        path.AddLine(rect.Left, rect.Bottom, rect.Left, rect.Top)
        path.AddLine(rect.Left, rect.Top, rect.Right, rect.Top)
        path.AddLine(rect.Right, rect.Top, rect.Left, rect.Bottom)

        region = New Region(path)
        brush = New LinearGradientBrush(rect, Color.Black, Color.Green, LinearGradientMode.Horizontal)

        e.Graphics.Clip = region
        e.Graphics.FillRectangle(brush, rect)


        path = New GraphicsPath(FillMode.Alternate)
        path.AddLine(rect.Right, rect.Top, rect.Right, rect.Bottom)
        path.AddLine(rect.Right, rect.Bottom, rect.Left, rect.Bottom)
        path.AddLine(rect.Left, rect.Bottom, rect.Right, rect.Top)

        region = New Region(path)
        brush = New LinearGradientBrush(rect, Color.Blue, Color.Black, LinearGradientMode.Horizontal)

        e.Graphics.Clip = region
        e.Graphics.FillRectangle(brush, rect)

        brush = New LinearGradientBrush(rect, Color.Blue, Color.Black, LinearGradientMode.Horizontal)
        brush.GammaCorrection = True          ' add this line
    End Sub

  What this produces are rectangles, two green then one blue. The rectangles then have diamond shapes inside of them. Any help would be greatly appreciated!