>Should be (If White is oposite to Black :o))
>

>SYS(2600, nOffset+nPos, 3, 0)
>

It is actually expecting 3 bytes, so it would be:

SYS(2600, nOffset+nPos, 3, 0h000000)
** Red (00-FF) --------------^^
** Green (00-FF) --------------^^
** Blue (00-FF) -----------------^^