Space between elements in GP Hooks

Hi Tom,

I’d like to put a space of 20 px between the image of the skates and the slider at http://204.44.87.244/~robert/

The code I currently have is

<?php if ( is_front_page() ) { ?>
<center><img title=”” alt=”” src=”url”>

[rev_slider home_page] </center>
<?php } else { ?>
<img title=”” alt=”” src=”url” class=”header-image”>
<?php } ?>

but the

makes it a bit too wide.

Can you tell me the proper way to code that space please.

Many thanks!