Here are a couple of similar projects i know about (i thought myself of doing a Light Wand for my Light Paintings) that might help you on your project:
Neopixel-Painter: Overview | NeoPixel Painter | Adafruit Learning System
Digital Light Wand: http://www.instructables.com/id/The-Digital-Light-Wand/
RGB LED Strip: Overview | RGB LED Strips | Adafruit Learning System
...but, as the others also said, if you give us more detailled info about your project we will then be in a better position to help you with your project.
Good luck!
=)