Create a new directory in app/views named 'posts'.
Add a new view to the posts directory named create.blade.php.
Edit the post create view and make it extend from the master layout. Add a form to the post create view that will allow creation of a post. The form action should be {{{ action('PostsController@store') }}}. The form should have inputs for a title and body.
Make sure the post create form can display old input.
Make the PostsController@store' method returnRedirect::back()->withInput()`. Test to see if when you submit the form that you get re-directed back with old input displayed.