WP Query post

<?php
//The Query
query_posts('post');
//The Loop
if ( have_posts() ) : while ( have_posts() ) :
the_post();
 ?>
                    <div class="col-lg-3 col-md-3 col-sm-6 col-xs-12">
                        <div class="hovereffect text-center">
                            <?php the_post_thumbnail( 'medium', array( 'class' => 'img-responsive' ) ); ?>
                            <div class="overlay">
                                <h2><?php the_title(); ?></h2>
                                <p>
                                    <a href="<?php the_permalink(); ?>">Read More</a>
                                </p>
                            </div>
                        </div>
                    </div>
<?php
endwhile;

endif;
//Reset Query
wp_reset_query();
?>