Blue Lemonade - cooking recipe

Ingredients

4 cups water
1 1/2 cups sugar (Splenda is fine)
6 lemons, juice and zest of (the skin only, not the white part, which is bitter)
1/2 cup blackberry
1/2 cup blueberries

Preparation

Heat 2 cups of water with sugar, until sugar dissolves.
Continue to heat for 5 minutes or so until it starts to thicken up.
Add the rest of the water, zest and juice.
Let cool to room temperature.
Put the blueberries in a blender and puree.
Stir berries into the lemonade and let sit for 2 hours at room temperature.
Strain lemonade and chill before serving.