JavaFX - carregando barra horizontal e pausando

Embora o javaFX já tenha um progress bar
profissional pronto para ser implementado,
resolvi criar esta aqui manualmente,
isto é didático e quem sabe servirá para 
complementar algum programa no futuro.
O progress bar é pausado e reiniciado
automaticamente, vale a pena conferir.
 
Veja abaixo uma imagem do programa em execução:

Veja abaixo um vídeo com o programa funcionando:

Veja abaixo o código do programa: 

import javafx.scene.Scene;

import javafx.scene.canvas.Canvas;

import javafx.scene.canvas.GraphicsContext;

import javafx.stage.Stage;

import javafx.scene.paint.Color;

import javafx.scene.layout.Pane;

import javafx.scene.text.Font;

import javafx.scene.text.FontWeight;

import javafx.event.ActionEvent;

import javafx.animation.KeyFrame;

import javafx.animation.Timeline;

import javafx.event.EventHandler;

import javafx.util.Duration;

import javafx.animation.*;

import javafx.application.Application;

////////////////////////////////////////////////////////////////////////////////

public class PROJETO extends Application {

     public static StringBuilder st = new StringBuilder ( );

     private static Timeline     videoTick, videoclick_1;

     static int a = 0, i, k = 0, load = 100, x1 = 190, y = 0;

     public static int TAM = 10;

     static Canvas canvas = new Canvas ( 620, 350 );

     static GraphicsContext ctx = canvas.getGraphicsContext2D ( );

     static Pane ro_ot = new Pane ( );

     static Scene sce_ne = new Scene ( ro_ot, 620, 350 );

     static String str_3 = "";

     public static StringBuilder st1 = new StringBuilder ( );

////////////////////////////////////////////////////////////////////////////

     public static void Informe ( ) {

         ctx.setFont ( Font.font ( "Arial", FontWeight.NORMAL, 13 ) );

         ctx.setFill ( Color.RED );

         ctx.fillText ( "Por: ", 200, 275 );

         ctx.setFill ( Color.BLUE );

         ctx.fillText ( "Samuel Lima", 240, 275 );

         ctx.setFill ( Color.BLACK );

         ctx.fillText ( "sa_sp10@hotmail.com", 200, 290 );

         ctx.setFill ( Color.RED );

         ctx.fillText ( " MUITO OBRIGADO", 250, 320 );

     }

     // ////////////////////////////////////////////////////////////////////////

     //Método usado como clock criado por mim

     public static int Sleep ( int x ) {

         while ( k < 100 ) {

              Duration duration = Duration.millis ( x );

              videoTick = new Timeline ( new KeyFrame ( duration,

                        new EventHandler < ActionEvent > ( ) {

                   public void handle ( ActionEvent actionEvent ) {

                        //System.out.print ( k );

                        k++;

                        if ( k == 10 ) {

                            videoTick.pause ( );

                            Sleep_2 ( 2000 );

                            st = new StringBuilder ( );

                            ctx.clearRect ( 180, 130, 400, 30 );

                            str_3 = "1";

                            a = str_3.length ( );

                            str_3 = str_3.substring ( 0, a );

                            st1.append ( str_3 );

                            k = 0;

                        }     

                        ctx.clearRect ( 200, 140, 300, 200 );

                        ctx.setFill ( Color.RED );

                        ctx.fillText (  " " + k, 240, 150 );

                        st.append ( "▀" );

                        ctx.setFill ( Color.rgb ( 4, 238, 144 ) );

                        ctx.fillText (  " " + st, 190, 140 );

                        Informe ( );

                   }

              } ) );

              break;

         }

         videoTick.setCycleCount ( Animation.INDEFINITE );

         videoTick.playFromStart ( );

         return k;

     }

     // ////////////////////////////////////////////////////////////////////////

     //Método usado como clock criado por mim

     public static int Sleep_2 ( int x ) {

         while ( y < 100 ) {

              Duration duration = Duration.millis ( x );

              videoclick_1 = new Timeline ( new KeyFrame ( duration,

                        new EventHandler < ActionEvent > ( ) {

                   public void handle ( ActionEvent actionEvent ) {

                        //System.out.print ( y );

                        y++;

                        videoclick_1.pause ( );  

                        st = new StringBuilder ( );

                        ctx.clearRect ( 180, 130, 300, 200 );

                        //Converte StringBuilder em String

                        str_3 = st1.toString ( );

                        //Converte String para inteiro

                        i = Integer.parseInt ( str_3 );

                        System.out.print ( i );

                        st1 = new StringBuilder ( );

                        if ( i == 1 )

                            videoTick.play ( );

                   }

              } ) );

              break;

         }

         videoclick_1.setCycleCount ( Animation.INDEFINITE );

         videoclick_1.playFromStart ( );

         return k;

     }

     // ////////////////////////////////////////////////////////////////////////

     public void start ( Stage stage ) {

         ctx.setFont ( Font.font ( "Arial", FontWeight.NORMAL, 15 ) );

         stage.setTitle ( "JAVAFX - CARREGANDO BARRA E PAUSANDO" );

         //Criando moldura e dando efeitos

         ro_ot.setStyle ( "-fx-padding: 5;" + "-fx-border-style: solid inside;"

                   + "-fx-border-width: 12;" + "-fx-border-insets: 5;"

                   + "-fx-border-radius: 5;" + "-fx-border-color: black;");

         ctx.setFill ( Color.RED );

         ctx.fillText ( "JAVAFX - CARREGANDO BARRA E PAUSANDO", 150, 50 );

         ctx.setFill ( Color.BLUE );

         ctx.fillText ( "Barra horizontal sendo carregada", 190, 80 );

         Sleep ( load );

         ro_ot.getChildren ( ).addAll ( canvas );

         stage.setScene ( sce_ne );

         stage.show ( );

     }

     // ////////////////////////////////////////////////////////////////////////

     public static void main ( String [ ] args ) {

         Application.launch ( args );

     }

}