// Create Behavior to rotate shape
    Transform3D yAxis = new Transform3D( );
    Alpha rotationAlpha = new Alpha(
        -1, Alpha.INCREASING_ENABLE,
        0, 0,
        4000, 0, 0,
        0, 0, 0 );
    RotationInterpolator rotator = new RotationInterpolator(
        rotationAlpha, objTrans,
        yAxis,
        0.0f, (float)Math.PI*2.0f );

    BoundingSphere bounds = new BoundingSphere(
        new Point3d( 0.0, 0.0, 0.0 ), 100.0 );
    rotator.setSchedulingBounds( bounds );
    objTrans.addChild( rotator );
    . . .