For Halloween this year I combined a Fox Mask designed by Winter Croft (Instagram) and the LED mapping technique from wow_elec_tron ( Etsy ).
I have used this mask design in the past. For burning man Flashy mask. I also made a giant mask for a friends band. Winter Croft makes some great masks.
The mask is from coroplast, uses a WeMos D1 mini and Adafruit Neopixel libary for the animations. The Source files can be found on my github.