Writing a theme function and template for Instagram Block (drupal 7)

instagram-block-image.tpl.php

/**
 * @file
 * Default theme implementation of an Instagram image link.
 *
 * Available variables:
 * - data: The entire data array returned from the Instagram API request.
 * - href: The url to the Instagram post page.
 * - src: The source url to the instagram image.
 * - width: The display width of the image.
 * - height: The display height of the image.
 */
?>
<a class="group" target="blank_" rel="group1" href="<?php print $href ?>">
  <img style="float: left; margin: 0 5px 5px 0px; width: <?php print $width ?>px; height: <?php print $height ?>px;" src=" <?php print $src ?>">
</a>

instagram_block.module

/**
 * Implements hook_theme().
 */
function instagram_block_theme() {
  $items = array(
    'instagram_block_image' => array(
      'render element' => 'element',
    ),
  );

  return $items;
}

instagram_block.render_array.inc

$content['children'][$post->id] = array(
  '#markup' => '',
  '#theme' => 'instagram_block_image',
  'post' => $post,
  'link' => $post->link,
  'url' => $post->images->thumbnail->url,
  'width' => $values['width'],
  'height' => $values['height'],
);