Specific steps to modify the flashing behavior of the P300 speller

[JaneATY]

Hello,
I want to modify the flashing mode of P3Speller, but from the source code, it's really hard to destinade the specific locations to change.

I am wondering to change the traditional RC_flashing_mode into some mode like RB mode, and I want to add a real_time analysis to help chang the flashing objects at each small round, each round help determine a region of objects(like a column or a row ).
Filstly, should I add a supervised algorithm to control which region to flash or should I abandon the RamdonGenerator ? Secondly, which lines in the code can I modify the falshing parameter ? Last but not the least important, I find it hard to understand the relationship among the classes.
Please show me the specific steps( parameters, or new classes) to do this programme.

Regards, JaneATY.