Как повернуть фигуру против часовой стрелки во время движения - C#

int v1x0 = 50, v1y0 = 50;
        int v2x0=50, v2y1 = 150;
        int v3x1 = 100,  v3y2 = 200;
        int v4x2=150, v4y1=150;
        int v5x2 = 150, v5y0 = 50;
        int v6x1=100, v6y3 = 0;
        Point[] point = new Point[7];
Graphics g = this.CreateGraphics();
            point[0] = new Point(v1x0, v1y0);
            point[1] = new Point(v2x0, v2y1);
            point[2] = new Point(v3x1, v3y2);
            point[3] = new Point(v4x2, v4y1);
            point[4] = new Point(v5x2, v5y0);
            point[5] = new Point(v6x1, v6y3);
            point[6] = new Point(v1x0, v1y0);
            g.FillPolygon(Brushes.Aqua, point);
            g.Clear(Color.Wheat);
            if (v1x0 <= 550)
            {
                v1x0 = v1x0 + 31;
                v1y0 = v1y0 + 18;
 
                v2x0 = v2x0 + 30;
                v2y1 = v2y1 + 15;
 
                v3x1 = v3x1 + 29;
                v3y2 = v3y2 + 12;
 
                v4x2 = v4x2 + 32;
                v4y1 = v4y1 + 15;
 
                v5x2 = v5x2 + 31;
                v5y0 = v5y0 + 18;
 
                v6x1 = v6x1 + 31;
                v6y3 = v6y3 + 13;
 
                point[0] = new Point(v1x0, v1y0);
                point[1] = new Point(v2x0, v2y1);
                point[2] = new Point(v3x1, v3y2);
                point[3] = new Point(v4x2, v4y1);
                point[4] = new Point(v5x2, v5y0);
                point[5] = new Point(v6x1, v6y3);
                point[6] = new Point(v1x0, v1y0);
                g.FillPolygon(Brushes.Aqua, point);
            }