custom loop ad in wordpress - php

Question

I am trying to show google ads in my website. I would like insert one at the top of the loop. 1st one and now more. It echo ad front every post, but I would like just show it once before the first one.
This is the code what I am using.
<div class="search-results">
<div class="row">
<?php
$counter_max = 4;
$column_size = 'col-sm-6 col-md-3';
if( $ads_search_layout == 'style-left' ){
$counter_max = 3;
$column_size = 'col-sm-6 col-md-4';
}
if( $view == 'list' ){
$counter_max = 2;
$column_size = 'col-md-6';
if( $ads_search_layout == 'style-left' ){
$counter_max = 1;
$column_size = 'col-md-12';
}
}
$counter = 0;
if( $ads->have_posts() ) {
while( $ads->have_posts() ){
$ads->the_post();
if( $counter == $counter_max ){
$counter = 0;
echo '</div><div class="row">';
}
?>
<div class="<?php echo esc_attr( $column_size ); ?>">
<?php
if(($counter>1) && ($counter == 0)){
echo( classifieds_load_path( 'includes/adsence.php' ) );
}
if( $view == 'grid' ){
$image_size = 'classifieds-ad-box-bug';
include( classifieds_load_path( 'includes/ad-box.php' ) );
}
else{
$excerpt_max = 154;
include( classifieds_load_path( 'includes/ad-box-alt.php' ) );
}
$counter++;
?>
</div>
<?php
}
}
?>
</div>
</div>
<?php wp_reset_postdata(); ?>