WS2812B (neopixel) and Graphics lib: custom matrix configuration

Thanks MaBe for the comment.

I modified the H count:

Graphics.createArrayBuffer(4,12,24);

but doesn't work for my 3 plates horizontal with this led array sequence:

00 01 02 03  16 17 18 19  32 33 34 35
07 06 05 04  23 22 21 20  39 38 37 36
08 09 10 11  24 25 26 27  40 41 42 43
15 14 13 12  31 30 29 28  47 46 45 44