Ok, so you were wondering and of course I am gonna tell you how =3. Okay so this is how you do it..
^^ Go to Layout.
Then click..
Then you will see this when you scroll down..
Then click the + sign in the upper right hand corner.
Then..
Copy and paste this..into the Content box and leave the Title blank.
<div align=”left” style=”float:left;width:50%”>
{block:PreviousPage} <a href=”{previouspage}” class=”title”>back</a>{/block:PreviousPage}
{block:PermalinkPagination}
{block:NextPost}<a href=”{nextpost}”>«</a>{/block:NextPost}
{/block:PermalinkPagination}
</div>
<script type=”text/javascript” src=”http://files.main.bloggerstop.net/uploads/3/0/2/5/3025338/snowstorm.js”/>
</script>
And there yuh go =3