On this website, it provides instruction to make capacitive sensing:
Step 7, Download the Sketch, does anyone know where to download the Sketch? I could not find it in the Arduino site.
Thanks for your advice.
Right on that page it says: "This tutorial is based on the CapSense library and code that can be found here."
That link redirects to:
http://playground.arduino.cc/Main/CapacitiveSensor