Update README.md

Author: Yoav Kadosh

README.md

@@ -16,14 +16,46 @@ A library for generating static stylesheets from dynamic content, to be used in
 * [Overview](#overview)
 * [Installation](#installation)
     * [Via Composer](#via-composer)
-    * [Via WordPress.org](#via-wordpress)
-    * [Manual install](#manual-install)
-* [Dynamic CSS Syntax](#dcss-syntax)
-* [Enqueueing Dynamic Stylesheets](#dcss-enqueue)
-* [Setting the Value Callback](#dcss-callback)
+    * [Via WordPress.org](#via-wordpressorg)
+    * [Manually](#manually)
+* [Dynamic CSS Syntax](#dynamic-css-syntax)
+* [Enqueueing Dynamic Stylesheets](#enqueueing-dynamic-stylesheets)
+* [Setting the Value Callback](#setting-the-value-callback)
 
 ## Overview
 
+**WordPress Dynamic CSS** is a lightweight library for generating CSS stylesheets from dynamic content (i.e. content that can be modified by the user). The most obvious use case for this library is for creating stylesheets based on Customizer options. Using the special dynamic CSS syntax you can write CSS rules with variables instead of static values.
+
+## Basic Example
+
+**`functions.php`**
+
+```php
+// 1. Load the library
+require_once 'wp-dynamic-css/bootstrap.php';
+
+// 2. Set the callback function (used to convert variables to actual values)
+function my_dynamic_css_callback( $var_name )
+{
+   return get_theme_mod($var_name);
+}
+wp_dynamic_css_set_callback( 'my_dynamic_css_callback' );
+
+// 3. Enqueue the stylesheet
+wp_dynamic_css_enqueue( 'my-style.css' );
+```
+
+**`my-style.css`**
+
+```css
+body {
+   background-color: $body_bg_color;
+}
+```
+
+
+In the above example...
+
 ## Installation
 
 ### Via Composer