unit Unit1;

interface

uses
  System.SysUtils, System.Types, System.UITypes, System.Classes, System.Variants,
  FMX.Types, FMX.Controls, FMX.Forms, FMX.Graphics,
   FMX.Dialogs, System.Generics.Collections, Contnrs,
    FMX.Objects;

type
  TForm1 = class(TForm)
    Timer1: TTimer;
    Timer2: TTimer;
    Circle1: TCircle;
    procedure FormCreate(Sender: TObject);
    procedure Timer1Timer(Sender: TObject);
    procedure Timer2Timer(Sender: TObject);
  private
    { Private declarations }
  public
    { Public declarations }
  end;

var
  Form1: TForm1;
list:TObjectList<tcircle>;
 circle:Tcircle;
 i:integer;
implementation

{$R *.fmx}

procedure TForm1.FormCreate(Sender: TObject);
begin
  list:=TObjectList<tcircle>.create;
end;

procedure TForm1.Timer1Timer(Sender: TObject);
begin
randomize;
circle:=tcircle.create(nil);
list.add(circle);
circle.parent:=form1;
circle.position.y:=0;
circle.position.x:=random(round(form1.ClientWidth-circle.width));
end;

procedure TForm1.Timer2Timer(Sender: TObject);
begin
for I :=0  to list.count-1 do
  with list.items[i] do
  begin
    position.y:=position.y+0.5;
  end;
end;

end.