function bimber_custom_amp_code() { ?>
 <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','https://www.google-analytics.com/analytics.js','ga');
ga('create', 'UA-82910904-1', 'auto');
ga('send', 'pageview');
</script>
<?php }
add_action( 'amp_post_template_head', 'bimber_custom_amp_code' );