I layered my vanilla wafers on top of parchment paper inside a glass baking pan.

I melted my white chocolate in a bowl, every 30 seconds, till it was good and melted. You can add food coloring specifically for chocolate here if you are interested in making colored bark.

Pour your melted white chocolate over your wafers and spread with a spatula until it has an even layer.

Let harden for about 3 minutes and then press your raspberries and blueberries onto the top.

I let mine set in the fridge overnight and then cut with a knife the next day.