Task: Yin and yang
C#:     public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
            Paint += Form1_Paint;
        }

        private void Form1_Paint(object sender, PaintEventArgs e)
        {
            Graphics g = e.Graphics;
            g.SmoothingMode = System.Drawing.Drawing2D.SmoothingMode.AntiAlias;

            DrawTaijitu(g, new Point(50, 50), 200, true);
            DrawTaijitu(g, new Point(10, 10), 60, true);
        }

        private void DrawTaijitu(Graphics g, Point pt, int width, bool hasOutline)
        {
            g.FillPie(Brushes.Black, pt.X, pt.Y, width, width, 90, 180);
            g.FillPie(Brushes.White, pt.X, pt.Y, width, width, 270, 180);
            float headSize = Convert.ToSingle(width * 0.5);
            float headXPosition = Convert.ToSingle(pt.X + (width * 0.25));
            g.FillEllipse(Brushes.Black, headXPosition, Convert.ToSingle(pt.Y), headSize, headSize);
            g.FillEllipse(Brushes.White, headXPosition, Convert.ToSingle(pt.Y + (width * 0.5)), headSize, headSize);
            float headBlobSize = Convert.ToSingle(width * 0.125);
            float headBlobXPosition = Convert.ToSingle(pt.X + (width * 0.4375));
            g.FillEllipse(Brushes.White, headBlobXPosition, Convert.ToSingle(pt.Y + (width * 0.1875)), headBlobSize, headBlobSize);
            g.FillEllipse(Brushes.Black, headBlobXPosition, Convert.ToSingle(pt.Y + (width * 0.6875)), headBlobSize, headBlobSize);
            if (hasOutline) g.DrawEllipse(Pens.Black, pt.X, pt.Y, width, width);
        }
    }

VB: Private Sub yinyang(Top As Integer, Left As Integer, Size As Integer)
    ActiveSheet.Shapes.AddShape(msoShapeChord, Top, Left, Size, Size).Select
    With Selection.ShapeRange
        .Adjustments.Item(1) = 90
        .Fill.ForeColor.RGB = RGB(255, 255, 255)
        .Line.ForeColor.RGB = RGB(0, 0, 0)
    End With
    ActiveSheet.Shapes.AddShape(msoShapeChord, Top, Left, Size, Size).Select
    With Selection.ShapeRange
        .Adjustments.Item(1) = 90
        .IncrementRotation 180
        .Fill.ForeColor.RGB = RGB(0, 0, 0)
        .Line.ForeColor.RGB = RGB(0, 0, 0)
    End With
    ActiveSheet.Shapes.AddShape(msoShapeOval, Top + Size \ 4, Left, Size \ 2, Size \ 2).Select
    With Selection.ShapeRange
        .Fill.ForeColor.RGB = RGB(255, 255, 255)
        .Line.ForeColor.RGB = RGB(255, 255, 255)
    End With
    ActiveSheet.Shapes.AddShape(msoShapeOval, Top + Size \ 4, Left + Size \ 2, Size \ 2, Size \ 2).Select
    With Selection.ShapeRange
        .Fill.ForeColor.RGB = RGB(0, 0, 0)
        .Line.ForeColor.RGB = RGB(0, 0, 0)
    End With
    ActiveSheet.Shapes.AddShape(msoShapeOval, Top + 5 * Size \ 12, Left + Size \ 6, Size \ 6, Size \ 6).Select
    With Selection.ShapeRange
        .Fill.ForeColor.RGB = RGB(0, 0, 0)
        .Line.ForeColor.RGB = RGB(0, 0, 0)
    End With
    ActiveSheet.Shapes.AddShape(msoShapeOval, Top + 5 * Size \ 12, Left + 2 * Size \ 3, Size \ 6, Size \ 6).Select
    With Selection.ShapeRange
        .Fill.ForeColor.RGB = RGB(255, 255, 255)
        .Line.ForeColor.RGB = RGB(255, 255, 255)
    End With
    ActiveSheet.Shapes.SelectAll
    Selection.ShapeRange.Group
End Sub
Public Sub draw()
    yinyang 200, 100, 100
    yinyang 275, 175, 25
End Sub