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unit Unit1;

interface

uses
  Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,
  Dialogs, ExtCtrls;

type
  TForm1 = class(TForm)
    Image1: TImage;
    procedure Image1Click(Sender: TObject);
  private
    { Private declarations }
  public
    { Public declarations }
  end;

var
  Form1: TForm1;

implementation

{$R *.dfm}

procedure TForm1.Image1Click(Sender: TObject);
  var x:integer;
begin
  x:=0;
  repeat
  Form1.Canvas.Ellipse(Form1.Width div 2-x, Form1.Height div 2-x, Form1.Width div 2+x, Form1.Height div 2+x);
  Form1.Canvas.Ellipse(Form1.Width div 2-2*x, Form1.Height div 2-2*x, Form1.Width div 2+2*x, Form1.Height div 2+2*x);
  x:=x+1;
  until x=73;

end;

end.                    

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procedure TForm1.Image1Click(Sender: TObject);
  var x:integer;
begin
  x:=0;
  Form1.Canvas.Brush.Style :=bsClear;
  repeat
     with Form1.Canvas do
       begin
       Ellipse(Form1.Width div 2-x, Form1.Height div 2-x, Form1.Width div 2+x, Form1.Height div 2+x);
       Ellipse(Form1.Width div 2-2*x, Form1.Height div 2-2*x, Form1.Width div 2+2*x, Form1.Height div 2+2*x);
       end;
    inc(x);
  until x=73;

end;                    

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  x:=73;
  repeat
  Form1.Canvas.Ellipse(Form1.Width div 2-x, Form1.Height div 2-x, Form1.Width div 2+x, Form1.Height div 2+x);
  Form1.Canvas.Ellipse(Form1.Width div 2-2*x, Form1.Height div 2-2*x, Form1.Width div 2+2*x, Form1.Height div 2+2*x);
  x:=x-1;
  until x<=0;                    

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 x := x - 5;