1. Since 1 cup of the strawberries; set asides. Halve remaining strawberries, set aside
2. Line bottem of 13*9- inch backing dish with cake slices. Top with sliced strawberries and a cup of the blueberries. Spread whipped topping evenly over berries.
3. Place strawberry halves and remaining 1/3 cup blueberries on whipped topping to create a flag design. Refrigerate until ready to serve.