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Grafik.top:= random(500);
Grafik.left:= random(600);					

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ontimer....
begin
a:=random(2); //ggf. mus man 3 einsetzen....
b:=random(2);
if (a=1)then fly.top:=fly.top+1;
if (b=1)then fly.left:=fly.left+1;
if (a=2)then fly.top:=fly.top-1;
if (b=2)then fly.left:=fly.left-1;
//bei 0 so lassen wie es ist
end;					

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unit Unit1;

interface

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

type
  TForm1 = class(TForm)
    SObjekt: TShape;
    Label1: TLabel;
    procedure SObjektMouseMove(Sender: TObject; Shift: TShiftState; X,
      Y: Integer);
  private
    { Private declarations }
  public
    { Public declarations }
  end;

var
  Form1: TForm1;

implementation

{$R *.dfm}

procedure TForm1.SObjektMouseMove(Sender: TObject; Shift: TShiftState; X,
  Y: Integer);
begin
SObjekt.Left:= random(800) ;
SObjekt.Top:= random(500) ;
end;

end.