revert to old folder structure to PR is easier to review

Author: KimberleyCook

index.html

@@ -57,11 +57,11 @@ <h3>JavaScript</h3>
           <li><a href="js/lesson2/tutorial.html">Lesson 2 - Expressions, Loops and Arrays</a></li>
           <li><a href="js/lesson3/tutorial.html">Lesson 3 - Introduction to jQuery</a></li>
           <li><a href="js/lesson4/tutorial.html">Lesson 4 - Introduction to HTTP Requests and APIs</a></li>
-          <li><a href="js/lesson5/tutorial.html">Lesson 5 - API's part 2 - Send yourself an SMS with Vonage</a></li>
-          <li><a href="js/lesson6/tutorial.html">Lesson 6 - HTTP Requests, AJAX and APIs (part 2)</a></li>
-          <li><a href="js/lesson7/tutorial.html">Lesson 7 - Drawing in Canvas</a></li>
-          <li><a href="js/lesson8/tutorial.html">Lesson 8 - Introduction to Testing</a></li>
-          <li><a href="js/lesson9/tutorial.html">Lesson 9 - Building your own app</a></li>
+          <li><a href="js/lesson4a/tutorial.html">Lesson 4a - API's part 2 - Send yourself an SMS with Vonage</a></li>
+          <li><a href="js/lesson5/tutorial.html">Lesson 5 - HTTP Requests, AJAX and APIs (part 2)</a></li>
+          <li><a href="js/lesson6/tutorial.html">Lesson 6 - Drawing in Canvas</a></li>
+          <li><a href="js/lesson7/tutorial.html">Lesson 7 - Introduction to Testing</a></li>
+          <li><a href="js/lesson8/tutorial.html">Lesson 8 - Building your own app</a></li>
         </ul>
 
         <h2 class="language-heading">Backend</h2>

js/lesson10/tutorial.md

@@ -37,7 +37,7 @@ You can view all requests issued by a website by going to the Network (or Net) t
 
 ![](assets/images/inspector_requests.png)
 
-As part of the response, a request gives back a **status code**. You can use this to identify if the request was successful or not. Below is a list of the most common.
+As part of the response, a request gives back a **status code**. You can use this to identify if the request was successful or not. Below is a list of the most common status codes.
 
 | Status code | Message | Description |
 | ------------| ------- | ------------ |

js/lesson4/tutorial.md

@@ -0,0 +1,27 @@
+---
+layout: page
+title: API's part 2 - Send yourself an SMS with Vonage
+---
+
+### Goal
+
+By the end of this tutorial you will have:
+
+* Sent yourself an SMS using the Vonage API
+
+## Refresh
+
+From the previous tutorial you learnt how HTTP requests work, the different between **GET** and **POST** and status codes. If you need a refresher pop back to the previous tutorial to remind yourself.
+
+## Exercise - Send yourself an SMS with the Vonage API
+
+<img src="./assets/images/VonageLogo.png" alt="Vonage Logo" width="350px">
+
+In the following Vonage API tutorial you will create an account, and send yourself an SMS. Just a heads up, it will involve you creating an account and giving your phone number.
+
+When signing up select NodeJS as your language. NodeJS is a runtine enviroment that allows you to run JavaScript on the server than in the browser which is what you would've been doing if you've followed our first few JavaScript tutorials.
+
+[Send yourself an SMS with the Vonage API](https://developer.nexmo.com/?utm_source=codebar&utm_campaign=Events&utm_medium=bitly&utm_source=Events)
+
+---
+This ends our sponsored Vonage tutorial **API's part 2 - Send yourself an SMS with Vonage**. Is there something you don't understand? Try and go through the provided resources with your coach. If you have any feedback, or can think of ways to improve this tutorial [send us an email](mailto:feedback@codebar.io) and let us know.