Google gives you the code!

Set up the account, follow the steps and you'll get one.

Here you go:

<!-- Google Analytics -->
<script>
(function(i,s,o,g,r,a,m){i['GoogleAnalyticsObject']=r;i[r]=i[r]||function(){
(i[r].q=i[r].q||[]).push(arguments)},i[r].l=1*new Date();a=s.createElement(o),
m=s.getElementsByTagName(o)[0];a.async=1;a.src=g;m.parentNode.insertBefore(a,m)
})(window,document,'script','//www.google-analytics.com/analytics.js','ga');

ga('create', 'UA-XXXX-Y', 'auto');
ga('send', 'pageview');

</script>
<!-- End Google Analytics -->Sign up for a Google Analytics account and obtain a tracking code that you insert where is says "UA-XXXX-Y" in the above code.

Here is a link the the help files: https://support.google.com/analytics..._topic=1726910

If all else fails hire someone that knows what they are doing, I'm sure we have many on this forum.

after registering the analytic service you would be given a number of option to add code to your site.you may directly copy the code and embed on your index page.