B4R Question ESP8266 and WS2812B LED Strip

could be pin #13 the MOSI pin LH side

Ah thanks for that, Daestrum - the pinout diagram I have didn't show those GPIO ports on it!

I shall try that and see how I get on.

My Code module should be considered obsolete for 2 reasons.
1- it only works with pin 8... no other pin will do.
2- A NeoPixel lib exists for B4R, wich allows for a more flexible use.
When I wrote that code module, no other libraries existed for B4R, and even for Arduino, the choices were limited.
It was "simple" to adapt as it mainly used C to tap into a "less known" arduino functionality.

Thanks for that CableGuy. I ended up using the Neopixel library and have managed to get things working.