@Override
    public void simpleInitApp() {
        this.cam.setLocation(new Vector3f(-50, 20, 50));
        this.cam.lookAt(Vector3f.ZERO, Vector3f.UNIT_Y);
        flyCam.setMoveSpeed(30);

        setupLighting();
        setupDome();
    }
Creates a spotlight controlled by rotating a node. The light will shine on a surrounding sphere.
The light will rotate on each axis, then on a random axis, then return to the X
axis.

@author Markil 3
jme3-examples/src/main/java/jme3test/light/TestLightControlSpot.java