RGBW neopixel leds

There is always the fallback solution

SPI2.setup({baud:3200000, mosi: B15);
SPI2.send4bit(g.buffer, 0b0001, 0b0011); 

@Gordon showed me when I had issues (w/ 2v01), see x by y w/ 24 bpp Graphics buffer visualized with neopixel string (conversation), post #7, where colors were off and unexpected pixels showed...

The fix is/will be in for 2v02+