[Chartjs]-How can i create a background of moving graphs like chartsjs?

This is an accual chart made in Chart.JS, note when you inspect that element it is on a <canvas id="hero-bar">. Then you can find how that chart works by looking in the JavaScript for the element with an id of hero-bar. The code for that bar chart happens to be starting on lines 108-161 in the source ( http://www.chartjs.org/) of the page.

In this case the values are simply randomized on a timer, below is the source code for that chart on thier page:

var data = [],
        barsCount = 50,
        labels = new Array(barsCount),
        updateDelayMax = 500,
        $id = function(id){
            return document.getElementById(id);
        },
        random = function(max){ return Math.round(Math.random()*100)},
        helpers = Chart.helpers;


    Chart.defaults.global.responsive = true;


    for (var i = barsCount - 1; i >= 0; i--) {
        data.push(Math.round(Math.random() * 100));
    };
    new Chart($id('hero-bar').getContext('2d')).Bar({
        labels : labels,
        datasets : [{
            fillColor : '#2B303B',
            data : data
        }]
    },{
        showScale : false,
        barShowStroke : false,
        barValueSpacing: 1,
        showTooltips : false,
        onAnimationComplete : function(){
            // Get scope of the hero chart during updates
            var heroChart = this,
                timeout;
            // Stop this running every time the update is fired
            this.options.onAnimationComplete = randomUpdate;

            this.options.animationEasing = 'easeOutQuint';

            randomUpdate();

            function randomUpdate(){
                heroChart.stop();
                clearTimeout(timeout);
                // Get a random bar
                timeout = setTimeout(function(){
                    var randomNumberOfBars = Math.floor(Math.random() * barsCount),
                        i;
                    for (i = randomNumberOfBars - 1; i >= 0; i--) {
                        heroChart.datasets[0].bars[Math.floor(Math.random() * barsCount)].value = Math.round(Math.random() * 100);
                    };
                    heroChart.update();
                },Math.random() * updateDelayMax);
            };
        }
    });