Фрактал, кривая Госпера. Ошибка, видимость переменных. Перевод с Паскаля на VB6

uses crt, graph;
Var Driv : Integer;
    Mode : Integer;
 
procedure D(x, y, l, u: real; t, q: integer);
procedure D2(var x, y: real; l, u: real; t, q: integer);
begin
   D(x, y, l, u, t, q);
   x:= x + l * cos(u);
   y:= y - l * sin(u)
end;
 
begin
   if t > 0 then begin
      if q = 1 then begin
         x:= x + l * cos(u);
         y:= y - l * sin(u);
         u:= u + pi
      end;
      u:= u - 2 * pi / 19;
      l:= l / sqrt(7);
      D2(x, y, l, u, t - 1, 0);
      D2(x, y, l, u + pi / 3, t - 1, 1);
      D2(x, y, l, u + pi, t - 1, 1);
      D2(x, y, l, u + 2 * pi / 3, t - 1, 0);
      D2(x, y, l, u, t - 1, 0);
      D2(x, y, l, u, t - 1, 0);
      D2(x, y, l, u - pi / 3, t - 1, 1);
      end
   else
      line(round(x), round(y), round(x + l * cos(u)), round(y - l * sin(u)))
end;
 
BEGIN
   clrscr;
   Driv:= Detect;
   InitGraph(Driv, Mode, '');
   D(100,355,400,0,4,0);
   repeat until KeyPressed;
   CloseGraph;
END.

Option Explicit
Const pi = 3.14159265
Dim x!, y!, l!, u!, t!, q!
 
Private Sub cmdD_Click()
    Scale (0, -100)-(640, 480)
    Call D(300, 155, 400, 0, 4, 0)
End Sub
 
Private Sub D(x, y, l, u, t, q)
If t > 0 Then
      If q = 1 Then
         x = x + l * Cos(u)
         y = y - l * Sin(u)
         u = u + pi
      End If
      u = u - 2 * pi / 19
      l = l / Sqr(7)
      Call D2(x, y, l, u, t - 1, 0)
      Call D2(x, y, l, u + pi / 3, t - 1, 1)
      Call D2(x, y, l, u + pi, t - 1, 1)
      Call D2(x, y, l, u + 2 * pi / 3, t - 1, 0)
      Call D2(x, y, l, u, t - 1, 0)
      Call D2(x, y, l, u, t - 1, 0)
      Call D2(x, y, l, u - pi / 3, t - 1, 1)
    Else
      Line (x, y)-(x + l * Cos(u), y - l * Sin(u))
   End If
End Sub
 
Sub D2(ByVal x, ByVal y, ByVal l, ByVal u, ByVal t, ByVal q)
    Call D(x, y, l, u, t, q)
    x = x + l * Cos(u)
    y = y - l * Sin(u)
End Sub
 
Private Sub Form_DblClick()
     SavePicture Image, "1.bmp"
End Sub