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#preload {
	display: none;
}

<?php
//* Do NOT include the opening php tag shown above. Copy the code shown below.

add_action( 'wp_footer', 'sk_preload_images' );
function sk_preload_images() {
    if ( ! is_front_page() ) {
        return;
    } ?>
    <div id="preload">
        <img src="<?php echo get_stylesheet_directory_uri(); ?>/images/home-section-4-bkgrd-hover.jpg" width="1" height="1" alt="Image 01" />
        <img src="<?php echo get_stylesheet_directory_uri(); ?>/images/home-section-5-bkgrd-hover.jpg" width="1" height="1" alt="Image 02" />
        <img src="<?php echo get_stylesheet_directory_uri(); ?>/images/home-section-6-bkgrd-hover.jpg" width="1" height="1" alt="Image 03" />
    </div>
<?php }