                               {id: 'x0', axisLabel: {rotate: rotate}},
                                {id: 'x1', axisLabel: {rotate: rotate}}
                            ],
                            yAxis: [
                                {id: 'y0', axisLabel: {rotate: rotate}},
                                {id: 'y1', axisLabel: {rotate: rotate}}
                            ]
                        });
                        next();
                    }, nextInterval);
                }

        