Need help with Non-Arduino Neopixel ring

Arduino: 1.8.5 (Windows 8.1), Board: "Arduino/Genuino Uno"

C:\Users\pauldjuarez\Documents\Arduino\Adafruit_NeoPixel-master\Adafruit_NeoPixel\examples\strandtest\strandtest.ino:1:31: fatal error: Adafruit_NeoPixel.h: No such file or directory

 #include <Adafruit_NeoPixel.h>

                               ^

compilation terminated.

exit status 1
Error compiling for board Arduino/Genuino Uno.

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