RGBW LED strips with Adafruit Bluefruit Feather M0 + Bluefruit App

Hi everyone,

First post! I'm new to Arduino and programming in general. I've been trying to figure out how to get my RGBW LED strips (WS2812B) working with my Adafruit Bluefruit Feather M0 via the Bluefruit app.

I've tried StrandtestBLE in the Adafruit NeoPixels library, but I'm not quite sure how to get it to work with RGBW LED strips as it's aimed at RGB strips and my attempts at altering the code don't seem to work (IE: changing NEO_RGB to NEO_RGBW where found). RGBWstrandtest works fine, and my LED strips have been using that for over a year.

Does anyone have any experience or a sketch with this working for RGBW LED strips?

Any help would be appreciated! I've gone through the Adafruit tutorials thoroughly but still can't get anything working.