Stupid random bars - does what it says!

program Project1;

{$APPTYPE CONSOLE}

{$R *.res}

uses
  System.SysUtils,Windows;

const
      barlength = 70;
type
   randombar = class
     strict private   // use strict private for normal visibility rules
       flength : integer;
       fx : integer;
       fy : integer;
       procedure display();
     public
       procedure setlength(value:integer);
       procedure setposition(x,y:integer);
       function getlength() : integer;
       procedure update();
       constructor create();
   end;
//--------Windows console stuff
function GetConInputHandle : THandle;
begin
   Result := GetStdHandle(STD_INPUT_HANDLE)
end;
function GetConOutputHandle : THandle;
begin
Result := GetStdHandle(STD_OUTPUT_HANDLE)
end;
//-----------------------------------
procedure printxy(x,y:integer;s:string);
var
  coords : _COORD;
  chandle : THandle;
begin
   chandle := GetConOutputHandle();
   coords.X := x;
   coords.Y := y;
   setconsolecursorposition(chandle,coords);
   writeln(s);
end;
//----- end of service routines
constructor randombar.create();
begin
  inherited;
  randomize;
  self.fx := random(80);

  self.fy := random(25);
  self.flength := random(barlength);
end;

procedure randombar.update;
begin

  self.flength := random(barlength);
  self.display;
end;


procedure randombar.setlength(value: Integer);
begin
    flength := value;
end;

function randombar.getlength;
begin
    Result := flength;
end;

procedure randombar.setposition(x: Integer; y: Integer);
begin
  fx := x;
  fy := y;
end;

procedure randombar.display;
begin
    printxy(fx,fy,stringofchar('X',flength)+stringofchar(' ',barlength-flength));
end;



var
   bar : array[1 .. 10] of randombar;
   i : integer;

begin
 for i := 1 to 10 do
   bar[i] := randombar.create;
   //bar.setposition(20,20);
   while true do
   begin
       for i := 1 to 10 do
           bar[i].update;

   end;



   readln;

end.