4
Try going to:
ctrl panel>system>blocks>themes>edit template and change the code:
<div style="text-align: center;">
<form action="index.php" method="post">
<{$block.theme_select}>
form>
div>
for
<MARQUEE onmouseover=this.stop() onmouseout=this.start()
scrollAmount=1 direction=up width="100%" height=100>
<div style="text-align: center;">
<form action="index.php" method="post">
<{$block.theme_select}>
form>
div>
marquee>
I can't test it but it should work fine.