I built this lightsaber to change color based on how my personal stock portfolio is performing. The print files can be used in conjunction with a Raspberry Pi Zero and LED strip to build whatever you would like to build. The carriage could be modified to work with other microcontrollers. For this project, I used a .875 ID / 1.00 OD polycarbonate tube as a major external housing for significantly greater strength.

There is a single button that can be used with short/long presses to switch between stock performance, weather data, and special modes (showing the IP address and a rainbow). 

More specific instructions for how to set this up and the code that is running on my lightsaber can be found on the project's GitHub page.