Raspberry Pi Forums

I'm writing a program that's going to, among other things, display an image from a USB webcam. As a complete newcomer to GUI programming, I'm using Tkinter and SimpleCV to do this. To get started, I tried running the example at https://github.com/sightmachine/SimpleC ... example.py but no image was displayed. My Raspberry Pi (specifically a BrickPi) did something for five seconds, but nothing visible happened. How can I troubleshoot this?