form in laravel format

{{ Form::open(['url' => '/admin', 'method' => 'post']) }}

{{Form::text('username', null,array('placeholder' => 'Username','class' => 'form-control','id' => 'input-username'))}}

{{Form::password('password', null,array('placeholder' => 'Password','class' => 'form-control','id' => 'input-password'))}}

{{Form::submit('Login', array('name' => 'sub','class' => 'btn btn-primary'))}}

{{ Form::close() }}