Preheat the stove to 350 degrees and grease an 11x15 square cake pan.
One at a time, unravel the cinnamon rolls completely, and arrange them in a snake pattern. Each cinnamon roll will stick to one side of the pan, and alternate to each side from cinnamon roll to cinnamon roll.
Bake for 20 minutes or until cinnamon rolls are golden brown on the top.
Remove and let cool completely. Do not remove them from the pan.
While cinnamon rolls are cooling, place the powdered sugar, strawberry preserves, raspberry preserves, heavy cream, and 2 tablespoons of milk in a medium bowl. Mix well. If the consistency is too thick, add in more milk, 1 Tablespoon at a time. It will be thicker than normal icing, but thinner than frosting.
Add in the dyes and stir well. You want almost a purple-ish burgundy color, with red undertones so that when it’s wiped on and thins out, it will look like real blood with the darker, reddish look.
Cover every single inch of the cinnamon rolls with a basting brush or spoon.
Serve, freak people out, and enjoy!