Kangaroo moving objects vectors

Hello,

I am playing with Daniel Picker circle packing script with boundary condition:

http://www.grasshopper3d.com/forum/attachment/download?id=2985220%3...

I just drew rectangles on top of them.

Then wondering if there is any possibility to get vectors to align those rectangles by direction of moving objects.

Is it possible to get the direction of the moving objects?

In processing there is possibility to calculate previous and current position of the object to find the movement vector. Is possible to get it with this script?

I uploaded .3dm file and .ghx.

Now orientation of rectangles are just applied in a random way...and when object tries to align themselves direction does not change, but it should.

Thanks.