an><span class='comma'>,</span> <span class='kw'>nil</span><span class='comma'>,</span> <span class='comment'># Don&#39;t use tile_*
</span>      <span class='id identifier rubyid_sprite'>sprite</span><span class='period'>.</span><span class='id identifier rubyid_flip_horizontally'>flip_horizontally</span><span class='comma'>,</span>
      <span class='id identifier rubyid_sprite'>sprite</span><span class='period'>.</span><span class='id identifier rubyid_flip_vertically'>flip_vertically</span><span class='