Создать графический элемент управления: сегмент индикатора

unit Unit1;
 
interface
 
uses
  Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,
  Dialogs, jpeg, ExtCtrls, StdCtrls;
 
type
  TForm1 = class(TForm)
    Plus: TButton;
    Minus: TButton;
    Image1: TImage;
    Image2: TImage;
    Image3: TImage;
    Image4: TImage;
    Image5: TImage;
    Image6: TImage;
    procedure PlusClick(Sender: TObject);
    procedure MinusClick(Sender: TObject);
  private
    { Private declarations }
  public
    { Public declarations }
  end;
 
var
  Form1: TForm1;
  i:integer;
implementation
 
{$R *.dfm}
 
procedure TForm1.PlusClick(Sender: TObject);
begin
i:=i+1;
if i=1 then begin
Image1.picture:=Image2.picture;
end;
if i=2 then begin
Image1.picture:=Image3.picture;
end;
if i=3 then begin
Image1.picture:=Image4.picture;
end;
if i=4 then begin
Image1.picture:=Image5.picture;
end;
if i>4 then begin
Image1.picture:=Image5.picture;
end;
 
end;
 
procedure TForm1.MinusClick(Sender: TObject);
begin
i:=i-1;
if i=4 then begin
Image1.picture:=Image5.picture;
end;
if i=3 then begin
Image1.picture:=Image4.picture;
end;
if i=2 then begin
Image1.picture:=Image3.picture;
end;
if i=1 then begin
Image1.picture:=Image2.picture;
end;
if i=0 then begin
Image1.picture:=Image6.picture;
end;
 
end;
end.