During a Sugar Crush are the candies chosen random?

At the end of candy crush, if you have moves remaining you get a "Sugar Crush". This is where some candies that are chosen on the board change to special candies. I was wondering if the candies chosen had any pattern.

More specifically, are there any rules that stop two candies forming next to each other, to maximize points. For example if two Wrapped Candies spawned next to each other, there area would be less then if they spawned somewhere else on the board.

Also, during the "Sugar Crush" are the colors picked by a Color Bomb random, or do they have a pattern, such as choosing the color directly above it.