Take a glass and place a layer of raspberries at the bottom. Then take the yogurt, open it, and add a layer over the raspberries. Place a layer of blueberries on top and cover with more yogurt. Next, add a layer of strawberries followed by another layer of yogurt. Finally, top it off with more blueberries and cover with the remaining yogurt. You can garnish the top of your parfait with more fruit if you wish.