More details on tumblr here:
http://dragonsquared.tumblr.com/post/119999679013/something-special-ive-been-working-on-in-my-spare
http://dragonsquared.tumblr.com/post/121551605958/been-working-on-this-special-prototype-for-a
And GIF of it in action:
https://www.weasyl.com/submission/1043498/led-hoodie-gif
Made by me!