Someone actually built this animatronic — a wearable Glamrock Freddy head whose jaw really opens, with glowing LED eyes. Here is how its two working parts match the ones on your robot.
The jaw swings on two skateboard bearings. Elastic bands pull it shut again, so it springs closed by itself.
On your robot this is the Jaw servo. The real mask has no motor at all — your own chin pushes the jaw, so it talks when you talk.
Two 16-LED WS2812 rings (44mm across), daisy-chained into one strip of 32 lights, run by an Arduino Nano on a rechargeable LiPo battery.
On your robot this is the LED board — same idea, same 32 lights.
Pick a colour on the ⚙️ Parts tab and this updates — it is the actual Arduino sketch, with your colour in it.
This fits the same hardware the real mask has — a jaw and lights, nothing else. Everything it cannot do will lock, exactly like the real one.
Exactly the parts you would buy to build the robot you have made. Add or remove hardware in ⚙️ Parts and this list changes with it.