This is pure luck with those- example: I'm pretty lucky when it comes to red ones, at this point I have 11 of them- one week I got 3 of them, almost day by day, while my husband was drawing few months in there and got his first one- ninjutsu- like 2 months ago and from that time he got another red just one more time.

Good luck there and lot of patience (and coins) buddy!