I need to separate the screen into regions that look like this (separated by black lines): 
The documentation says Most regions are rectangular or elliptical in shape, but you can use the methods of this class to create more complex shapes by adding, subtracting, and intersecting other regions. I can't figure out how to create these.
For context I am trying to replicate the StickyCorners: Using UIFieldBehavior and other UIDynamicBehaviors demo, but adding 4 more sticky points, 1 at each midpoint (indicated by red circles).
