1Spinner Example 
2$(document).ready(function() {
3   var table = $('#table_id').DataTable({
4     "language": {
5                    "processing": '<i class="fa fa-spinner fa-spin" style="font-size:24px;color:rgb(75, 183, 245);"></i>'
6                 }
7   });
8 });

1"language": 
2{          
3"processing": "<img style='width:50px; height:50px;' src='Content/images/loadingNew.gif' />",
4}