magento2 get categories withc children as lists

<?php

use Magento\Framework\App\Bootstrap;
require __DIR__ . '/app/bootstrap.php';

$bootstrap = Bootstrap::create(BP, $_SERVER);

$obj = $bootstrap->getObjectManager();

$state = $obj->get('Magento\Framework\App\State');
$state->setAreaCode('frontend');

$quote = $obj->get('Magento\Checkout\Model\Session')->getQuote()->load(1);

$categoryCollection = $obj->create('Magento\Catalog\Model\Category');
$category           = $categoryCollection->load(1);
$subcats            = $category->getChildrenCategories();
?>
<ul >
    <?php
foreach ($subcats as $subcat) {
?>

        <li>
            Name: <?php
    echo $subcat->getName();
?>
            Id: <?php
    echo $subcat->getId();
?>
                <?php
    if ($subcat->getChildrenCategories()):
?> <ul>
                    <?php

        foreach ($subcat->getChildrenCategories() as $subcat2):
?>
                <li>
                                            Name: <?php
            echo $subcat2->getName();
?>
                                                        Id: <?php
            echo $subcat2->getId();
?>
                </li>
                                                        <?php
            if ($subcat2->getChildrenCategories()):
?> <ul>
                    <?php


                foreach ($subcat2->getChildrenCategories() as $subcat3):
?>
                <li>
                    Name: <?php
                    echo $subcat3->getName();
?>
                                                        Id: <?php
                    echo $subcat3->getId();
?>

                                                        <?php
                    if ($subcat3->getChildrenCategories()):
?> <ul>
                    <?php


                        foreach ($subcat3->getChildrenCategories() as $subcat4):
?>
                <li>
                    Name: <?php
                            echo $subcat4->getName();
?>
                                                        Id: <?php
                            echo $subcat4->getId();
?>

                                                         <?php
                            if ($subcat4->getChildrenCategories()):
?> <ul>
                    <?php


                                foreach ($subcat4->getChildrenCategories() as $subcat5):
?>
                <li>
                    Name: <?php
                                    echo $subcat5->getName();
?>
                                                        Id: <?php
                                    echo $subcat5->getId();
?>
                                                        <?php
                                    if ($subcat5->getChildrenCategories()):
?> <ul>
                    <?php


                                        foreach ($subcat5->getChildrenCategories() as $subcat6):
?>
                <li>
                    Name: <?php
                                            echo $subcat6->getName();
?>
                                                        Id: <?php
                                            echo $subcat6->getId();
?>

                </li>


                </li>


                </li>

                </li>

                                <?php
                                        endforeach;
?>
                                                                                             </ul>

                                <?php
                                    endif;
?>
                                <?php
                                endforeach;
?>
                                                                                             </ul>

                                <?php
                            endif;
?>
                                <?php
                        endforeach;
?>
                                                                                             </ul>

                                <?php
                    endif;
?>
                                <?php
                endforeach;
?>
                                                                                             </ul>

                                <?php
            endif;
?>
                <?php
        endforeach;
?>
                                                </ul>

                <?php
    endif;
?>
        </li>

        <?php
}
?>
</ul>