This blog entry just shows a screenshot and the code for a little JavaFX AnimationTimer test I wrote.
AnimationTimer is a JavaFX class which comes in handy if you are in need of a callback hook which should be called on every frame. With this class it is possible to implement simple animations for example, but it could be used for various other things as well. The example code below shows how to make hundreds of circles wiggle.
A self contained project is available here.