It's a fan, attached to a Nerf gun, with LED strips meticulously patterned on the fan-blades, and coded with different time-intervals. Time. Well. Spent.
AMAZING! You should showcase your system to special effects teams in the media business. They could use your skills and expertise to create some amazing productions. I wonder if this setup can be paired with CGI.... You could improve anime adaptations into live-action productions.