Bake {2} 9-inch cake layers according to the direction on the box.

Wash and pat dry fruit.

Hull and slice all but 6 strawberries and set aside in a bowl.

When the cake has cooled, trim the layers so they will fit into your trifle dish.

Then stack {from bottom to top} in this order:

Cake, whipping cream, sliced strawberries, cake, whipping cream.

Next add a ring of blueberries around the edge of the trifle dish about 1 inch wide.

Place 6 strawberries in the center of the trifle.

Place in the refrigerator until ready to serve.