javascript - Update HighCharts every 5 seconds -

i using code render highchart:

  <script>     var chart = new highcharts.chart({         chart: {            renderto: 'container1',            title: '',            type: 'column'         },         xaxis: {             categories: ["<?php echo  join($data0, '","') ?>"],             title: {                 text: 'month'             }         },         yaxis: {             title: {                 text: 'orders'             }         },         series: [{            name: '<?php echo  date("y",strtotime("-1 year")); ?>',            color: '#666666',            data: [<?php echo  join($data1, ',') ?>]         }, {            name: '<?php echo  date("y"); ?>',            color: '#2196f3',            data: [<?php echo  join($data2, ',') ?>]         }],         credits: {             enabled: false         },         title: {             text: ''         }   });   </script> 

how can update every 5 seconds , show indication on chart if changes?

try

setinterval(function(){     chart.series[0].update({         data: [<?php echo  join($data1, ',') ?>]     }, true);      chart.series[1].update({         data: [<?php echo  join($data2, ',') ?>]     }, true); }, 5000);