I used the basic white bread recipe. Except I mixed the wet and dry ingedients seperate. Guestimated the ratio portions of each color with the wet ingredients into seperate bowls. Added food dye till I got the color I wanted then doubled the added food dye. Then added the dry ingredients. After it rised I rolled up the colored bread the legnth of the bread pan. Put down a layer of white bread on the bottom and started adding the colored bread. Adding more white bread as I went to support and fill in the gaps. I misted the bread in the pan at each step to help it glue together and not dry out.
If that does not make sense you can try this frog bread recipe Frog Bread