function my_pre_save_post( $post_id )
{
    // check if this is to be a new post
    if( $post_id != 'new' )
    {
        return $post_id;
    }

    // Create a new post
    $post = array(
        'post_status'  => 'draft' ,
        'post_title'  => 'A title, maybe a $_POST variable' ,
        'post_type'  => 'post' ,
    );

    // insert the post
    $post_id = wp_insert_post( $post );

    // update $_POST['return']
    $_POST['return'] = add_query_arg( array('post_id' => $post_id), $_POST['return'] );

    // return the new ID
    return $post_id;
}

add_filter('acf/pre_save_post' , 'my_pre_save_post' );

$postid = get_the_ID();
                                        if($postid ==50){ //50 is a Page I created for the Form

                                     $options = array(
                                            'post_id' => 'new',//$post->ID, // post id to get field groups from and save data to
                                            'field_groups' => array(46), // this will find the field groups for this post (post ID's of the acf post objects)
                                            'form' => true, // set this to false to prevent the <form> tag from being created
                                            'form_attributes' => array( // attributes will be added to the form element
                                                'id' => 'post',
                                                'class' => '',
                                                'action' => '',
                                                'method' => 'post',
                                            ),
                                            'return' => add_query_arg( 'updated', 'true', get_permalink() ), // return url
                                            'html_before_fields' => '', // html inside form before fields
                                            'html_after_fields' => '', // html inside form after fields
                                            'submit_value' => 'Update', // value for submit field
                                            'updated_message' => 'Post updated.', // default updated message. Can be false to show no message
                                        );
    acf_form( $options );
}

$posts = get_posts(array(
    'post_type'     => 'event',
    'posts_per_page'    => -1,
    'meta_key'      => 'location',
    'meta_value'        => 'melbourne'
));

if($posts)
{
    foreach($posts as $post)
    {
        the_field('titel');
    }
}