how to change flash message notification in laravel code example

Example 1: laravel flash message

@if ($message = Session::get('success'))<div class="alert alert-success alert-block">	<button type="button" class="close" data-dismiss="alert">×</button>	        <strong>{{ $message }}</strong></div>@endif@if ($message = Session::get('error'))<div class="alert alert-danger alert-block">	<button type="button" class="close" data-dismiss="alert">×</button>	        <strong>{{ $message }}</strong></div>@endif@if ($message = Session::get('warning'))<div class="alert alert-warning alert-block">	<button type="button" class="close" data-dismiss="alert">×</button>		<strong>{{ $message }}</strong></div>@endif@if ($message = Session::get('info'))<div class="alert alert-info alert-block">	<button type="button" class="close" data-dismiss="alert">×</button>		<strong>{{ $message }}</strong></div>@endif@if ($errors->any())<div class="alert alert-danger">	<button type="button" class="close" data-dismiss="alert">×</button>		Please check the form below for errors</div>@endif

Example 2: laravel flash message

public function create(Request $request){	$this->validate($request,[        'title' => 'required',        'details' => 'required'        ]);	$items = Item::create($request->all());	return back()->with('success','Item created successfully!');}