Jiggly Gelatin

• 4, 0.44 oz boxes sugar-free gelatin, strawberry
• 4, 0.44 oz boxes sugar-free gelatin, berry blue
• 4 cups boiling water, divided
• 4 cups cold water, divided
• 1½ cups strawberries, sliced
• 1¼ cups blueberries
• fat-free whipped topping

* The two colors will be made separately, so don't dissolve both at the same time.
Dissolve red gelatin thoroughly in 2 cups of boiling water. Add 2 cups cold water and sliced strawberries. Pour into a 9x13 dish. Refrigerate for an hour until firm. Dissolve blue gelatin in 2 cups of boiling water. Add 2 cups of cold water and blue berries. Carefully pour over the firm red gelatin mix. Refrigerate until firm.
Cut into 16 large squares and serve with 4 tbsp of fat-free whipped topping (figured in nutritional information).