Add strawberries (including syrup) to strawberry Jello, and pour into Bundt pan. Mix 2 cups Cool Whip and cubed angel food cake (or, marshmallows if using) into the clear Jello, pour on top of Red Jello. Spread to even. Add Blueberries to Blue Jello, and pour on top of White Jello. Cover with plastic wrap and return to Refrigerator for 3 hours or until ready to serve.