Not a week goes by in the Adafruit Forums that someone isn’t heartbroken to discover that the NeoPixel and Servo libraries won’t work together in the same Arduino sketch. Fear not, help is on the way!
Rather than leave you with a “mysterious black box” workaround, it also seemed a good opportunity to introduce some advanced Arduino programming concepts. If you just want a fix and aren’t interested in a lengthy technical explanation, that’s totally fine! You can skip ahead to the third page, “The TiCoServo Library” and get started.