Button Back To TOP Responsive

Paste Above </head>
<link href='//maxcdn.bootstrapcdn.com/font-awesome/4.2.0/css/font-awesome.min.css' rel='stylesheet'/>

Paste Above </b:skin>

#back-to-top{background:
#E73037;color:#ffffff;padding:8px 10px;font-size:24px}
.back-to-top{position:fixed!important;position:absolute;bottom:20px;right:20px;z-index:999}


Paste Above </body>

<div class='back-to-top'><a href='#' id='back-to-top' title='back to top'>
<i class='fa fa-chevron-up'/>
</a></div>
<script>
$(window).scroll(function() {
if($(this).scrollTop() &gt; 200) {
$(&#39;#back-to-top&#39;).fadeIn();
} else {
$(&#39;#back-to-top&#39;).fadeOut();
}
});

$(&#39;#back-to-top&#39;).hide().click(function() {
$(&#39;html, body&#39;).animate({scrollTop:0}, 1000);
return false;
});
</script>


 DEMO : 

scroll down and look at the bottom right corner