private void init(Stage stage) {
        Random generator = new Random();

        int petals = 0;
        while(petals < petalsMin) {
            petals = generator.nextInt(petalsMax) + 1;
        }

        Group root = new Group();
        stage.setResizable(false);
        stage.setScene(new Scene(root,width,height));
        Ellipse ellipse;
        Group g = new Group();

        for(int i = 0; i < petals; ++i) {
            ellipse = new Ellipse(width/2,height/4,25,90);
            ellipse.setRotate(i*(360/(petals)));
            ellipse.setFill(Color.RED);
            g.getChildren().add(ellipse);
        }

        root.getChildren().add(g);
    }