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README.md

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 # Scriptable Elements
 
-Scripts to use with Siri
+Metro Madrid has launched a feature to know how long does the next metro train will takes to get to a station. With this scripts it's possible to integrate this functionality with Siri, asking for the waiting times.
+
+To implement this for a concrete station, it's needed to implement a new script where indicates the number of the station, if Siri have to present UI with the information as a Table and a callback function where the complete information is passed as String.
+
+```javascript
+    metroTiming(<Metro Station Number as String>, <Siri will present UI or not as bool>, <callback function>)
+```
+
+For example:
+
+This script is used to Barrio del Pilar Station and Siri will speaks all the information returned by the request.
+
+```javascript
+    let completionCallback = function(text){
+        Speech.speak(text)
+    }
+
+    metroTiming("902", false, completionCallback);
+```