How to get URL from Media entity field inside a paragraph in Drupal 8

theme_preprocess.php

<?php 

use Drupal\Core\Cache\CacheableMetadata;
use Drupal\Core\Url;
use Drupal\media\Entity\Media;
use Drupal\Core\Site\Settings;
use Drupal\file\Entity\File;

/**
 * Preprocess functions for background iamge in Tagline paragraph
 */

function mytheme_preprocess_paragraph__tagline(&$variables) {
  $variables['background'] = FALSE;
  $paragraph = $variables['paragraph'];
  $field = $paragraph->get('field_background_image')->first();
  if ($field) {
    $image_field = $paragraph->get('field_background_image')->first()->getValue();
    $media = Media::load($image_field['target_id']);
    $media_field = $media->get('field_media_image')->first()->getValue();
    $file = File::load($media_field['target_id']);
    if ($file) {
      $background = $file->getFileUri();
      $variables['background'] = file_create_url($background);
    }
  }
}