Ad Advertisement block after 4 Blocks automatically

I have website vokzo.com. I add apps block and one is advertisment block But Advertisement block only show one time on whole homepage at the top of apps block's.I want Advertisement block insert automatically after 4 apps blocks .Like when I add apps block's from admin panel after complete 4 blocks website should insert advertisement block automatically.I hope everyone will understand .Below is my index.blade.php file code please someone see and help me.Thank's

@extends( "layouts.master")

@section('content')

<div class="row">

     <div class="navigation">    @include('web.home.partials.slider')
        <ul>
            <li>
                <a href="/category/games">
                    <div class="icon" style="background: #F2B258;"><img src="https://static.apkpure.com/mobile/static/imgs/games.png" width="20"></div>
                    <div class="text">Hot Games</div>
                </a>
            </li>
            <li>
                <a href="/category/apps">
                    <div class="icon" style="background: #FA8484;"><img src="https://static.apkpure.com/mobile/static/imgs/apps.png" width="20"></div>
                    <div class="text">Hot Apps</div>
                </a>
            </li>
            <li>
                <a href="/category">
                    <div class="icon" style="background: #5EC9F3"><img src="https://static.apkpure.com/mobile/static/imgs/category.png" width="20"></div>
                    <div class="text">Category</div>
                </a>
            </li>
        </ul>
    </div>


   

    
    @include('common.ads-placement',[ 'identifier' => 'homepage-leaderboard'])
    
    
    @include('web.home.partials.featured-apps')
    

  

</div>

@endsection

@push('javascript')

@endpush

via Chebli Mohamed