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unit Unit10;

interface

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

type
TForm1 = class(TForm)
Button1: TButton;
Button2: TButton;
procedure Button1Click(Sender: TObject);
procedure Button2Click(Sender: TObject);
private
{ Private 宣言 }
public
{ Public 宣言 }
end;

var
Form1: TForm1;

implementation

{$R *.DFM}

procedure TForm1.Button1Click(Sender: TObject);
procedure star(x,y,z:integer;a:real);
var i:integer;
begin
Canvas.MoveTo(x-round(z*cos(a)),y-round(z*sin(a)));
for i:=1 to 3 do begin
Canvas.LineTo(x-round(z*cos(a+2*pi*i/3)),y-round(z*sin(a+2*pi*i/3)));
end;
Canvas.MoveTo(x-round(z*cos(a+pi)),y-round(z*sin(a+pi)));
for i:=1 to 3 do begin
Canvas.LineTo(x-round(z*cos(a+pi+2*pi*i/3)),y-round(z*sin(a+pi+2*pi*i/3)));
end
end;

var j,r,s,t:integer;
begin
randomize;
j:=random(9);
r:=random(600);
s:=random(400);
t:=(random(20)+1)*10;
case j of
0 :Canvas.Pen.Color := clBlack;
1 :Canvas.Pen.Color := clRed;
2 :Canvas.Pen.Color := clFuchsia;
3 :Canvas.Pen.Color := clYellow;
4 :Canvas.Pen.Color := clLime;
5 :Canvas.Pen.Color := clGreen;
6 :Canvas.Pen.Color := clAqua;
7 :Canvas.Pen.Color := clBlue;
8 :Canvas.Pen.Color := clPurple;
9 :Canvas.Pen.Color := clWhite;
end;
star(r,s,t,0);
end;

procedure TForm1.Button2Click(Sender: TObject);
begin
close
end;

end.

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