private Node createBackground(Scene scene) { // application area Rectangle applicationArea = RectangleBuilder.create() .arcWidth(20) .arcHeight(20) .fill(Color.rgb(0, 0, 0, .80)) .x(0) .y(0) .strokeWidth(2) .stroke(Color.rgb(255, 255, 255, .70)) .build(); applicationArea.widthProperty().bind(scene.widthProperty()); applicationArea.heightProperty().bind(scene.heightProperty()); return applicationArea; }