Just my opinion, but I would soooo let someone else(like at a salon) do that for you. I dont know if it was your intent to do it or just for directions to take to someone.
My hair is done similarly(with the foils like leesali mentioned)...except with 3 colors, brown on bottom layer, plum on the middle layer with a few blonde, and alternating plum, brown and blonde on the top layer. Even my stylist has trouble keeping the colors from bleeding onto one another sometimes and she had been doing it for almost 2 years.
My hair is thick and usually around shoulder length when she does it and it takes around 4 hours to do. It is just me, but I couldnt do anything like that for more than an hour. I would get tired and bored after part of my head was done and go do something else.