Update README.md

README.md

@@ -1,2 +1,35 @@
 # yii2-sparkline
 A wrapper for Jquery Sparkline in Yii2
+
+Installation
+------------
+
+The preferred way to install this extension is through [composer](http://getcomposer.org/download/).
+
+Either run
+
+```
+php composer.phar require --prefer-dist mrlco/yii2-sparkline "*"
+```
+
+or add
+
+```
+"mrlco/yii2-sparkline": "*"
+```
+
+to the require section of your `composer.json` file.
+
+Usage
+-----
+
+```php
+<?= \mrlco\sparkline\Sparkline::widget([
+    'clientOptions' => [
+        'type' => 'bar',
+        'height' => 20,
+        'barColor' => '#00a65a',
+    ],
+    'data' => [90, 80, 90, -70, 61, -83, 63]
+]); ?>
+```