Counting overlapping figures How many four-sided figures appear in the diagram below?

I tired counting all the rectangles I could see, but that didn't work. How do I approach this?

Go step by step. 
First Picture: 1 rectangle
Second Picture: 2 additional rectangles. The small rectangle, which has been added and the big one, which contains the two small rectangles.
Third picture: The big rectangle. Then two rectangles, which contains 2 small linked rectangles. And the small rectangle, which has been added
Fourth picture: Only one small rectangle.
Fifth Picture: The rectangle, which contains the two small rectangle and the small additional rectangle.
You go on like this. Then sum the amount of rectangles.

