If you change your H1 tag to:
<h1 style="
width:100%;
height:288px;
background-image: url('http://i60.tinypic.com/rse735.png');
display: inline-block;">
</h1>
Then your image will automatically repeat. However, as it stands your image doesn't repeat too well. So, you'll probably want to edit in your photo editing s/w.
I'd recommend not stretching your image as it won't look very good.
Also, you may want to create your "Shaggy Little Lion" text as a separate graphic which can be centered on top of the image below.