Refresh SharePoint 2013 Page Automatically

1) Simply create a text file in your local machine
2) Add following content to the text file

<script type="text/javascript" language="javascript">
var reloadTimer = null;
var sURL = unescape(window.location.pathname);

function setReloadTime(secs)
{ if (arguments.length == 1)
   { if (reloadTimer) clearTimeout(reloadTimer);
       reloadTimer = setTimeout("setReloadTime()", Math.ceil(parseFloat(secs)*1000));
   }
   else
   { reloadTimer = null;
     location.reload(true);
     window.location.replace( sURL );
   }
}
setReloadTime(30);
</script>

3) Go to SharePoint and upload the text file to a Document folder (Read Permission to all users)
4) Get the file URL and copy it
5) Go to WebPart page, EDIT mode
6) Add a Content Editor WebPart
7) Set URL of File link to uploaded text file URL in Content Editor WebPart
8) Save and Hide Your Content Editor WebPart

Your page will refresh in every 30 seconds. :) :)