diff --git a/examples/quick2wire-io.py b/examples/quick2wire-io.py
index 8614b73..5b60b2b 100644
--- a/examples/quick2wire-io.py
+++ b/examples/quick2wire-io.py
@@ -1,3 +1,4 @@
+# Turns on each pin of an mcp23017 on address 0x20 ( quick2wire IO expander )
 import wiringpi2
 
 pin_base = 65
@@ -10,4 +11,5 @@
 for pin in pins:
 	wiringpi2.pinMode(pin,1)
 	wiringpi2.digitalWrite(pin,1)
-
+	wiringpi2.delay(1000)
+	wiringpi2.digitalWrite(pin,0)