How to retrive Google analytics data to an HTML page?

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Javascript

I am trying to retrive google analytics data and display it on my html page...
I tried using the javascript code but it shows blank page
link where i copied the javascript code
http://ga-dev-tools.appspot.com/embed-api/basic-dashboard/

What I have tried:

I have tried the following javascript code, but shows blank page...

<script>
(function(w,d,s,g,js,fs){
g=w.gapi||(w.gapi={});g.analytics={q:[],ready:function(f){this.q.push(f);}};
js=d.createElement(s);fs=d.getElementsByTagName(s)[0];
js.src='https://apis.google.com/js/platform.js';
fs.parentNode.insertBefore(js,fs);js.onload=function(){g.load('analytics');};
}(window,document,'script'));
</script>


<script>

gapi.analytics.ready(function() {

gapi.analytics.auth.authorize({
container: 'embed-api-auth-container',
clientid: 'REPLACE WITH YOUR CLIENT ID'
});


var viewSelector = new gapi.analytics.ViewSelector({
container: 'view-selector-container'
});

// Render the view selector to the page.
viewSelector.execute();


var dataChart = new gapi.analytics.googleCharts.DataChart({
query: {
metrics: 'ga:sessions',
dimensions: 'ga:date',
'start-date': '30daysAgo',
'end-date': 'yesterday'
},
chart: {
container: 'chart-container',
type: 'LINE',
options: {
width: '100%'
}
}
});


viewSelector.on('change', function(ids) {
dataChart.set({query: {ids: ids}}).execute();
});

});
</script>