Delphi Random и ProgressBar

var
  Form1: TForm1;
  a:integer;
 
implementation
 
{$R *.dfm}
 
procedure TForm1.Timer1Timer(Sender: TObject);
begin
progressbar1.Position :=progressbar1.Position+10;
if ProgressBar1.Position = 100 then
end;
 
procedure TForm1.Button1Click(Sender: TObject);
begin
timer1.Enabled:=true;
a:=0;
a:=random (3);
if a=1 then memo1.lines.text:=ComboBox1.text+'Затащит';
if a=2 then memo1.lines.text:=ComboBox2.text;
 
end;
end.

procedure TForm1.Timer1Timer(Sender: TObject);
begin
 
progressbar1.Position :=progressbar1.Position+10;
if ProgressBar1.Position = 100 then
begin
a:=random (3);
if a=1 then memo1.lines.text:=ComboBox1.text+'Затащит';
if a=2 then memo1.lines.text:=ComboBox2.text;
end;
 
end;
 
procedure TForm1.Button1Click(Sender: TObject);
begin
timer1.Enabled:=true;
 
end;
end.

Timer1.Enabled:=False;

procedure TForm1.Button1Click(Sender: TObject);
begin
timer1.Enabled:=true;
randomize;
end;
 
procedure TForm1.Timer1Timer(Sender: TObject);
var a:byte;
begin
progressbar1.Position :=progressbar1.Position+10;
if ProgressBar1.Position = 100 then
 begin
  Timer1.Enabled:=false;
  a:=random (2);
  if a=0 then memo1.lines.text:=ComboBox1.text+' Затащит'
  else memo1.lines.text:=ComboBox2.text;
 end;
end;