Using Point object to draw circles. Changing text direction and kerning

PDF pdf = new PDF();
Font f1 = new Font(pdf, "Helvetica");
// Please note:
// All font and image objects must be
// created before the first page object.

Page page = new Page(pdf, Letter.PORTRAIT);

TextLine text = new TextLine(
        f1, "             Hello, World.");
text.SetPosition(300.0, 300.0);
for (int i = 0; i < 360; i += 15) {
    text.SetTextDirection(i);
    text.DrawOn(page);
}

Point point = new Point(300.0, 300.0);
point.SetShape(Point.CIRCLE);
point.SetFillShape(true);

point.SetColor(RGB.BLUE);
point.SetRadius(37.0);
point.DrawOn(page);

point.SetRadius(25.0);
point.SetColor(RGB.WHITE);
point.DrawOn(page);

pdf.Wrap();
pdf.Save("Example_05.pdf");