Moving rectangles

Controller.java

package sample;

import javafx.animation.KeyFrame;
import javafx.animation.Timeline;
import javafx.animation.TranslateTransition;
import javafx.event.ActionEvent;
import javafx.fxml.FXML;
import javafx.fxml.Initializable;
import javafx.scene.layout.AnchorPane;
import javafx.scene.paint.Color;
import javafx.scene.shape.Rectangle;
import javafx.util.Duration;

import java.net.URL;
import java.util.Random;
import java.util.ResourceBundle;

public class Controller implements Initializable{

    @FXML
    private AnchorPane anchorPane;

    TranslateTransition transition;

    TranslateTransition transition_1;

    Random rand = new Random();


    @FXML
    void start(ActionEvent event) {
        resetRectangles();
        transition.play();
        transition_1.play();
    }

    public void resetRectangles(){
        int recHeightX = rand.nextInt(250);
        int recHeightX_1 = rand.nextInt(250);

        int recHeight = 25 + rand.nextInt(50);
        int recWidth = 25 + rand.nextInt(50);

        int recHeight_1 = 25 + rand.nextInt(50);
        int recWidth_1 = 25 + rand.nextInt(50);

        Rectangle rectangle = new Rectangle(-100,recHeightX,recHeight,recWidth);

        Rectangle rectangle_1 = new Rectangle(600,recHeightX_1,recHeight_1,recWidth_1);

        transition = new TranslateTransition();

        transition_1 = new TranslateTransition();

        anchorPane.getChildren().addAll(rectangle,rectangle_1);
        rectangle.setFill(Color.web("#2191FB"));
        rectangle_1.setFill(Color.web("#BA274A"));

        //Rectangle transition
        transition.setNode(rectangle);
        transition.setDuration(Duration.seconds(5));
        transition.setToX(700);


        //Rectangle_1 transition
        transition_1.setNode(rectangle_1);
        transition_1.setDuration(Duration.seconds(5));
        transition_1.setToX(-700);
    }

    @Override
    public void initialize(URL url, ResourceBundle resourceBundle) {
        Timeline timeline = new Timeline(new KeyFrame(Duration.seconds(0.1), e->{
            resetRectangles();
            transition.play();
            transition_1.play();
        }));
        timeline.setCycleCount(Timeline.INDEFINITE);
        timeline.play();
    }
}

Main.java

package sample;

import javafx.application.Application;
import javafx.fxml.FXMLLoader;
import javafx.scene.Parent;
import javafx.scene.Scene;
import javafx.stage.Stage;

public class Main extends Application {

    @Override
    public void start(Stage primaryStage) throws Exception{
        Parent root = FXMLLoader.load(getClass().getResource("sample.fxml"));
        primaryStage.setTitle("Hello World");
        primaryStage.setScene(new Scene(root));
        primaryStage.show();
    }


    public static void main(String[] args) {
        launch(args);
    }
}

sample.fxml

<?xml version="1.0" encoding="UTF-8"?>

<?import javafx.scene.control.Button?>
<?import javafx.scene.layout.AnchorPane?>


<AnchorPane fx:id="anchorPane" maxHeight="-Infinity" maxWidth="-Infinity" minHeight="-Infinity" minWidth="-Infinity" prefHeight="400.0" prefWidth="600.0" xmlns="http://javafx.com/javafx/15.0.1" xmlns:fx="http://javafx.com/fxml/1" fx:controller="sample.Controller">
   <children>
      <Button layoutX="280.0" layoutY="347.0" mnemonicParsing="false" onAction="#start" text="Start" />
   </children>
</AnchorPane>

nice