preliminary

All the design is made from a group that have two curves.

I use mesh between these curves two connect these curves.Also try to keep balance between different colors and textures.

I use this group 5 times. Every time i rotate this group and change the direction of it in whole design.Concerned what the exercise is asked, i try to relate all the voids and do not cut the flow of space.

Final

 firstly, i made two groups.They name group A and group B.
This combination is group A. that consist of 4 elements.
2 brown elements
1 black element
1 mesh element
I keep balance in the colors.

 This is group B that consists of 5 elements.This group have two curves. I make a contrast between curves.Not only between their colors but also their direction.
I put a mesh element between curves as a bonding.As it is obvious there is a clear flow of space between these curves.Thus they are in relation with each other.

I put these groups in a way to make rhythm.

A__B__A

 B__A__B

A__B__A

In the center of my design i made a hierarchy between the square elements in their place.As you follow the squares in each step they rise.

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Pattern