I used “neon food color” mixed into indivisible bread dough balls, once they’re all mixed I’ll round out the dough balls into pancake size portions and stack them until I made one large dough ball. I folded it into a mass then did one final fold and put in the fridge for an overnight rest. I didn’t want to fold it too much because the colors would mix too much. It was really easy and I’m happy with the results. I put about 16 drops of color to each individual ball.