Favorite Green Smoothie Recipe?

I really would like to make one, but I've been getting all sorts of info on them that may or may not be true. For example, is it true that the ideal green smoothie has 40% greens and 60% fruits? Should I add some almondmilk? I have spinach, blueberries, strawberries, bananas, and I think I have kale. What could I make with this?