slideshow with different pictures on each page

Hello, I do not speak English, but I have a problem with nivoslider. I put the slideshow in the page.php file and I want that for every page that I create, it inserts images from a specific folder.
example:
https://127.0.0.1:8080/wordpress/contacts/

<div class="slider-wrapper theme-default">
    <div id="slider" class="nivoSlider">
        <a href="#" title="This is an example of a caption">
            <!--img src="<?php echo get_template_directory_uri() . '/images/images-homepage/images-01.jpg'; ?>" alt="" /-->
            <?php
                 echo "<img src=".get_template_directory_uri()."/images/images-".$name_page."/image-01.jpg\" alt=\"immagine\" />\n";
                 echo "<img src=".get_template_directory_uri()."/images/images-".$name_page."/image-02.jpg\" alt=\"immagine\" />\n";
            ?>
        </a>
    </div>
</div>