Geek chique for the dark!
The idea sparked when I saw some 3d prints on tulle. The pattern is printed on four pieces of tulle (front/back, once normal and onced horizontally flipped). Glue Neopixels on some of the hexagons and wire them together. Sew the four tulle pieces on the hood and connect the wires.
The LEDs are controlled by an ESP8266 which resides (of course) in a 3d-printed case as well (case based on the design of jperson https://www.thingiverse.com/thing:2850128). A power jack connects to the ESP and directly to the LEDs, so supply 5V here. I used an USB Powerpack and an adapter cable.
The code running on the ESP8266 will change the cycling colours: The more wifi activity in the area, the faster the colors will change. A short white flash is added if a client probe is detected (meaning that a wireless device just outed itself to know a certain network).