$def with(category, seq, page, show_left, show_right)
<div class="all-designs">
  $for design in seq:
      $:design
</div>
<div class="lrnav">
$if show_left:
    <a href="/category/$category/?page=$(page - 1)">&lt;&lt;</a>
$if show_right:
    <a href="/category/$category/?page=$(page + 1)">&gt;&gt;</a>
</div>