title: Transparent Node Background
body: <p>How do i <strong>programmatically</strong> make a <code>Node</code>'s background transparent-(see through); I am currently playing with <code>AnchorPane</code> as a parent Node to other <code>ProgressIndicator</code> and other nodes as children, and i want them to stand out ? I tried with <code>Scene</code> and it wasn't close to what i wanted, any workaround?</p>
  
  <p>lets say</p>
  
  <pre><code>// suppose i have a fake layout like this
      AnchorPane ap = new AnchorPane();
  
      ProgressIndicator pi = new ProgressIndicator();
      ProgressIndicator pii = new ProgressIndicator();
      ProgressIndicator piii = new ProgressIndicator();
      ProgressIndicator piiii = new ProgressIndicator();
      AnchorPane.setRightAnchor(pi, 0.0);
      AnchorPane.setBottomAnchor(piii, 0.0);
      AnchorPane.setRightAnchor(piiii, 0.0);
      AnchorPane.setBottomAnchor(piiii, 0.0);
      AnchorPane.setLeftAnchor(piii, 0.0);
      Circle circle = new Circle();
      circle.setRadius(50);
      circle.setFill(Color.RED);
      AnchorPane.setBottomAnchor(circle, 210.0);
      AnchorPane.setTopAnchor(circle, 210.0);
      AnchorPane.setLeftAnchor(circle, 210.0);
      AnchorPane.setRightAnchor(circle, 210.0);
      ap.getChildren().addAll(pi,pii,piii,circle,piiii);
      primaryStage.setScene(new Scene(ap,500,500));
      primaryStage.initStyle(StageStyle.UNDECORATED);
      primaryStage.show();
  </code></pre>
  
  <p>My requirement here is to make my children <code>Nodes</code> stand out,without the white background of the <code>AnchorPane</code> -(so AnchorPane needs to be transparent), how do i achieve that?</p>