first upload all files

Modules/FlashSale/Resources/views/admin/flash_sales/tabs/products.blade.php

@@ -0,0 +1,19 @@
+<div class="panel-wrap flash-sale" id="products-wrapper">
+    {{-- Products will be added here dynamically using JS --}}
+</div>
+
+<div class="form-group">
+    <button type="button" class="add-product btn btn-default m-l-15">
+        {{ trans('flashsale::flash_sales.form.add_product') }}
+    </button>
+</div>
+
+@include('admin::partials.selectize_remote')
+@include('flashsale::admin.flash_sales.templates.product')
+
+@push('globals')
+    <script>
+        FleetCart.data['flash_sale.products'] = {!! old_json('products', $flashSale->products) !!};
+        FleetCart.errors['flash_sale.products'] = @json($errors->get('products.*'), JSON_FORCE_OBJECT);
+    </script>
+@endpush

Modules/FlashSale/Resources/views/admin/flash_sales/tabs/settings.blade.php

@@ -0,0 +1,5 @@
+<div class="row">
+    <div class="col-md-8">
+        {{ Form::text('campaign_name', trans('flashsale::attributes.campaign_name'), $errors, $flashSale, ['required' => true]) }}
+    </div>
+</div>