This is a very simple command-line writer for Ozobot flash codes.
mono ./FlashWriter.exe CRYCYMCRWKWRKWYBRCKWKWRYBKYKCYKMRYKWGBRKWKWKWYMGKWKYWCGCMCM
Codes are as they come from the FlashReader - White=W, Red=R, Green=G, Blue=B, Cyan=C, Magenta=M, Yellow=Y, Black=K.