Before you attempt to breed Bettas, Know it's a rather challenging, expensive, research intensive, and potentially frustrating process. I'm not sure but judging by your mutilation of the English language, I assume you are a kid. Or maybe English is just your second language. I dont know, so I hope I don't come across as judgmental.
Anyhow, I am not a breeder but here is an article that sounds about right.
Hopefully others can help you out.