I want to make this a banner -help?-

I want to make this photo:<br><br><a href="http://www203.lunapic.com/editor/?action=url&url=631/177/702894614402027&s=www80&files=1"; target="_blank" class="bb-url">http://www203.lunapic.com/editor/?actio ... 80&files=1</a><br><br>a banner.<br><br>Any suggestions on what to do? I know <span style="font-style:italic">how</span> to make a banner. I just don't know what I should do to make this a banner.