Solder your BlinkyTape Control Board to the light string.

Us some hotglue to protect the solder joints.

Download PatternPaint from https://blinkinlabs.com/blinkytape/patternpaint/.

Connect the BlinkyTape Control Board to your computer.

Start PatternPaint, if all works start playing.

In my case i had to download the source from their github repo, open the .pro file in QTcreator and run it from there. I run I3 on Arch on a ThinkPad BTW.

Take your ugly jacket, the safety pins and the string. Fix it somehow, Take care not to  block it too much.

In PatternPaint make a cheesy enough pattern to embarass yourself. 

Upload to the BlinkyTape.

Show off your lack of taste  and efford to your fellow nerds.