Drupal 7 module to generate multiple blocks

Inside module_name.module, add:

/**
 * Implements hook_block_info().
 */
function example_block_info() {
  $blocks['ad_banner1'] = array(
    'info' => t('Ad Banner 1'),
  );
  $blocks['ad_banner2'] = array(
    'info' => t('Ad Banner 2'),
  );

  return $blocks;
}

/**
 * Implements hook_block_view().
 */
function example_block_view($delta = '') {
  $block = array();

  switch ($delta) {
    case 'ad_banner1':
      $block['content'] = 'shtuffenins';
      break;

    case 'ad_banner2':
      $block['content'] = 'shtuffenins2';
      break;
  }

  //associate js and css
  $path = drupal_get_path('module', 'example');
  drupal_add_js($path . '/js/example-scripts.js');
  drupal_add_css($path . '/css/example-styles.css');

  return $block;
}

Example of js file:

jQuery(document).ready(function ($) {
  //your code goes here
});