Help me pn JavaFX,Thank you

You want to write a GUI that will display a collection of circles. When the mouse moves over any of the circles, they will "light up" by changing their color to yellow. Complete the code below.

// inside of a loop:

Circle circle = new Circle(...); // circles are created

// Part A: what code goes here to allow the circle to listen for mouse movement?

rootNode.getChildren.add(circle);

Part B: Write the method to react to the mouse motion.