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Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,
Dialogs, ExtCtrls;type
TForm1 = class(TForm)
Timer1: TTimer;
procedure Timer1Timer(Sender: TObject);
procedure FormActivate(Sender: TObject);
private
{ Private declarations }
public
{ Public declarations }
end;var
Form1: TForm1;implementation{$R *.dfm}var X, Y, DX, DY: Integer;
procedure TForm1.FormActivate(Sender: TObject);
begin
WindowState := wsMaximized;
Timer1.Interval := 50;
Randomize;end;procedure TForm1.Timer1Timer(Sender: TObject);begin
X := Random(Screen.Width - 10);
Y := Random(Screen.Height - 10);
Canvas.Pen.Color := Random(65535);
Canvas.Pen.Width := Random(7);
DX := Random(400);
DY := Random(400);
Canvas.RoundRect(X, Y, X + DX, Y + DY, DX div 2, DY div 2);end;end.