PHP to show image only on homepage

[system]

I am new to PHP, and trying to use it to create an if statement on a wordpress site in order to show a full-width image only on the homepage. I added this code in homepage-template.php, below get_header() and above the rest of the content, but it did not work. Would anyone know if there is a problem with the code, or I just need to find the right place to put it? Thanks

[php]

<?php function storefront_add_image() { ?>

<div id="strip">
    <div class="col-full">
  
    </div>
</div>
<?php

}
add_action( ‘storefront_before_content’, ‘storefront_add_image’ );

?>[/php]

[astonecipher]

Don’t over complicate it.

Go to the homepage page and add the image. The header, footer, and sidebars can be added to others, but pages are their own page.