Pre Bogiho lebo je opica

package sample;

import javafx.event.ActionEvent;
import javafx.fxml.FXML;
import javafx.scene.control.Slider;
import javafx.scene.control.TextArea;
import javafx.scene.shape.Circle;

public class Controller {
    @FXML TextArea timer_area;
    @FXML public TextArea score_area;
    @FXML public Slider difficulty_slider;
    @FXML private Circle blueCircle;
    @FXML private Circle redCircle;

    private boolean playing;
    private int blueScore;
    private int redScore;
    private static int ticks;
    private int difficulty;

    @FXML
    public void new_game(ActionEvent event) {
        if(!playing) {
            playing = true;
            Thread timer = new Thread(() -> {
                try {
                    while (playing) {
                        Thread.sleep(50);
                        ticks++;
                        score_area.setText(blueScore +":" + redScore);
                        timer_area.setText(convertToStringTime((5*60) - (ticks*50/1000)));
                        if(playing) {
                            showHideBlueCircle();
                            showHideRedCircle();
                        }
                        if(ticks >= 6000) playing = false;
                    }
                } catch (InterruptedException e) {
                    e.printStackTrace();
                }
            });
            timer.start();
        }
        blueScore = 0;
        redScore = 0;
        ticks = 0;
        difficulty = (int) difficulty_slider.getValue();
        setupGame();
    }

    private void showHideBlueCircle() {
        int perV = difficulty;
        int perH = difficulty * 2;
        if(ticks % (perH + perV) == perV) {
            double ranX = Math.random() * 331 - blueCircle.getRadius();
            double ranY = Math.random() * 600 - blueCircle.getRadius();
            blueCircle.setLayoutX(ranX);
            blueCircle.setLayoutY(ranY);
            blueCircle.setVisible(true);
        }
        if(ticks % (perH + perV) ==  0) {
            blueCircle.setVisible(false);
        }
    }

    private void showHideRedCircle() {
        int perV = difficulty;
        int perH = difficulty * 2;
        if(ticks % (perH + perV) == perV) {
            double ranY = Math.random() * (331 - redCircle.getRadius() * 2) + ;
            double ranX = Math.random() * (600 - redCircle.getRadius() * 2);
            redCircle.setLayoutX(ranX);
            redCircle.setLayoutY(ranY);
            redCircle.setVisible(true);
        }
        if(ticks % (perH + perV) ==  0) {
            redCircle.setVisible(false);
        }
    }

    private void setupGame() {
        int r = (int) difficulty_slider.getValue() * 3;
        blueCircle.setRadius(r);
        redCircle.setRadius(r);
    }

    private String convertToStringTime(int timeInSeconds){
        int seconds = timeInSeconds % 60;
        int minutes = (timeInSeconds - seconds) /60;
        return String.format("%02d:%02d", minutes, seconds);
    }

    @FXML
    private void blueCircleMouseEntered() {
        if(playing && blueCircle.isVisible()) {
            blueCircle.setVisible(false);
            blueScore++;
        }
    }

    @FXML
    private void redCircleMouseEntered() {
        if(playing && redCircle.isVisible()) {
            redCircle.setVisible(false);
            redScore++;
        }
    }
}