it took them two years to do it maybe they got lucky, maybe not. plus how many breeding pairs did they have going at the same time?? i am just saying if u are going to really do this it could take awhile. if it is something u want to do then do it. hmmmmmm... if it where me i would start by getting a black beta and a white beta both with the tails u want on ur beta and see what happens. unless there is a betta that already has the half and half color characteristic u will have too just wait till u find what u want. and i would probably try to breed as many pairs as possible at any given time and do some black dad x white mom, and white dad x black mom. see what the offspring look like and go from there. pick the ones u like and keep breeding like that untill u get what u want. that is how it is done.