Code Analytics

Continuous Blocks using the bandstand, at this time I need to install a code of Google Analytics in my temple-

What is the temple where the file should I add the following code:

<script>
   (function (i, s, o, g, r, a, m) {i = r, i [r] = i [r] | | function () {
   (i [r] q = i [r] q | | []..) push (arguments)}, i [r] 1 * l = new Date (); s.createElement a = (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 ', 'g');

   ga ('create', 'UA-12345678-1', 'nombredemisitioweb.com');
   ga ('send', 'pageview');

</ script>

index.php of temple just above </body>