var chartDom = document.getElementById('container');
var myChart = echarts.init(chartDom);
var option;
var v_data = [150, 230, 224, 218, 135, 147, 260];
var data = [];
var option = {
  xAxis: {
    type: 'category',
    data: ['Mon', 'Tue', 'Wed', 'Thu', 'Fri', 'Sat', 'Sun']
  },
  yAxis: {
    type: 'value'
  },
  series: [{
    data: v_data,
    animation: false,
    type: 'line',
    smooth:true,
    isAnimationActive: false
  }, {
    data: [],
    animation: true,
    type: 'line',
    smooth:true,
    isAnimationActive: false,
    lineStyle: {
      color: '#d5ceeb'
    }
  }],

};

option && myChart.setOption(option);
setInterval(function() {
  a = v_data.shift();
  v_data.push(a);
  if (data.length == v_data.length) {
    data = [];
  }
  data.push(a);
  myChart.setOption({
    series: [{}, {
      data: data,
      smooth:true,
      lineStyle: {
        color: 'red'
      }
    }]
  });
}, 300);