dear BenR
nice to get your rapid reply. there is plenty of working c code online, mostly in rpi forums. i was trying something quick and dirty, re-defined nop in the supplementary code, and got it compiled. I found that there is actually a single sequence being sent, but not in the correct timing ...

dear matrix team

i use flowcode 8.2.2.15 pro and noticed that the neopixel ws2811/12 component does not compile for the raspberry family.
the nops used for cycle delay are not working.
Building fc1_ws2812b
c:\users\Temp\cc6MarXG.o: In function `FCD_06621_LED_WS2811__Refresh':
fc1_ws2812b.c:(.text ...