displaying listings in blocks by category in Random Order in home page

Hi - I saw a topic here on the forum about displaying ads by category
I put it on my website's home page and I liked it.
But every time I access the website, it only shows the same ads
from the same store.

How can I add randomization to these ads?
-------------
1) get listings into memory:

<?php
   osc_query_item(array(
    "category" => "4"   
  ));
?>
------------
2) show listings:

<?php
while(osc_has_custom_items()) {
  echo osc_item_id();
}
?>
===============
This is mine and it worked but the code doesn't do random

 <?php osc_query_item(array("category" => "3", "results_per_page" => "4")); ?>
 <?php View::newInstance()->_exportVariableToView('', veronika_random_items()); ?>
       <?php if( osc_count_custom_items() > 0) { ?>
            <div class="wrap" style="margin:-30px 0 -20px 0;">
              <?php $c = 1; ?>
             <?php while( osc_has_custom_items() ) { ?>
                <?php veronika_draw_item($c, 'gallery'); ?>

https://docs.osclass-classifieds.com/query-items-custom-listings-select-i86

<?php
   osc_query_item(array(
    "category" => 4,
    "order" => "RAND()"
  ));
?>
This might work until there is filter that check if RAND() is allowed.

Oh my god. Thank you so much. I want to kiss you. lol