module.xml

<?xml version="1.0"?>

<config xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="urn:magento:framework:Module/etc/module.xsd">
    <module name="Coco_First" setup_version="2.0.0">
        <!-- Ordered Dependencies for this module -->
        <sequence>
            <module name="None_ExistentModule" />
        </sequence>
    </module>
</config>

registration.php

<?php

\Magento\Framework\Component\ComponentRegistrar::register(
    \Magento\Framework\Component\ComponentRegistrar::MODULE,     
    "Coco_Second",
    __DIR__
);