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 |  
    public Boolean setScreen(final String name) {
        if (getScreen(name) != null) {
            final DoubleProperty opacity = opacityProperty();
            final ObjectProperty<Color> baseColor = new SimpleObjectProperty<>();
 
            if (!getChildren().isEmpty()) {
                Timeline fade = new Timeline(
                        new KeyFrame(Duration.ZERO, new KeyValue(opacity, 1.0)),
                        new KeyFrame(new Duration(500), new EventHandler<ActionEvent>() {
                            @Override
                            public void handle(ActionEvent event) {
                                getChildren().remove(0);
                                getChildren().add(0, getScreen(name));
                                Timeline fadeIn = new Timeline(
                                        new KeyFrame(Duration.ZERO, new KeyValue(opacity, 0.0)),
                  /*ICI SVP--->*/       new KeyFrame(Duration.ZERO, new KeyValue(baseColor, Color.BLACK)), // ??? FONCTIONNE PAS
                                        new KeyFrame(new Duration(500), new KeyValue(opacity, 1.0))
                                );
                                fadeIn.play();
                            }
                        }, new KeyValue(opacity, 0.0))
                );
                fade.play();
            }
 
            else {
                setOpacity(0.0);
                getChildren().add(getScreen(name));
 
                Timeline fadeIn = new Timeline(
                        new KeyFrame(Duration.ZERO, new KeyValue(opacity, 0.0)),
                        new KeyFrame(new Duration(800), new KeyValue(opacity, 1.0))
                );
                fadeIn.play();
            }
            return (true);
        }
        else {
            System.out.println("Screen Has Not Been Loaded");
            return (false);
        }
    } | 
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