In a bowl, stir together yogurt, vanilla, and ¼ cup of Splenda Multi-Use Syrup until evenly combined. Scoop yogurt onto the freezer-safe tray, and carefully spread it out to ¼-inch thickness with a spatula.
In a small bowl, add raspberries with 2 tablespoons of Splenda Multi-Use Syrup and mash with the back of a fork. (If using frozen raspberries, microwave until softened.) Mixture should become jam-like. Dallop the raspberry mixture around the yogurt. Using the back of a spoon, create pretty swirls of raspberry red around the yogurt.
Sprinkle fresh blueberries and coconut on top. Freeze at least 4 hours, or overnight.
Remove Yogurt Bark from freezer. Gently break bark into smaller hand-held sized pieces. Enjoy immediately or store in the freezer and use within 1 week.