From 9c64a1dc2f544ad93880ce963b5381ab0c780cb6 Mon Sep 17 00:00:00 2001
From: Dave Jones <dave@waveform.org.uk>
Date: Mon, 21 Sep 2015 12:04:51 +0100
Subject: [PATCH] Update the docs with an example

Simple demo of when_dark / when_light
---
 docs/index.md | 10 +++++++---
 1 file changed, 7 insertions(+), 3 deletions(-)

diff --git a/docs/index.md b/docs/index.md
index 26d8306..8ebf727 100644
--- a/docs/index.md
+++ b/docs/index.md
@@ -154,13 +154,17 @@ while True:
 Retrieve light sensor value:
 
 ```python
+from time import sleep
 from gpiozero import LightSensor
 
-light = LightSensor(6)
+sensor = LightSensor(18)
+led = LED(16)
+
+sensor.when_dark = led.on
+sensor.when_light = led.off
 
 while True:
-    if light.light_detected:
-        print("Light detected")
+    sleep(1)
 ```
 
 ### Temperature Sensor