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Neopixels are LED’s that have a WS2812 controller built in. Communication is done with a serial single bit interface. You can string them together as each one has an input and an output pin . Practically you can make rings or stick by coupling several NEOpixels together.
There are several libraries to operate these leds.
Makuna and Adafruit the best known. The makuna version also supports the ESP8266.