E cole este código:
<style type="text/css">
#blog-pager{font-size:normal;padding:10px 0;clear:both;}.showpageArea{font-family:verdana,arial,helvetica;color:#000;font-size:11px;margin:10px}
.showpageArea a{color:#000}
.showpageNum a{padding:3px 8px;margin:0 2px;text-decoration:none;border:1px solid #999;background:#ddd;color:#000;}
.showpageNum a:hover{border:1px solid #888;background:#ccc}
.showpageOf{margin:0 2px 0 0;padding:3px 8px;margin:0 2px;text-decoration:none;border:1px solid #999}
.showpagePoint{color:#fff;padding:3px 8px;margin:2px;border:1px solid #999;background:#666; text-decoration:none}
</style>
<script style='text/javascript'>
var numshowpage=4;
var postperpage =3;
var upPageWord="Anterior";
var downPageWord="Próxima";
var home_page="/";
var urlactivepage=location.href;
</script>
<script style='text/javascript' src='https://sites.google.com/site/paginacaodt/home/paginacaodt-tk/.js'></script>
Pronto. Salve, e já vai estar prontinho :)