I went online and got Inspired by Amy Cunningham's interlocking design series. I tweaked the idea a little bit, so that it would work for my house and you could do the same thing. It's easy and very customizable because you can chose your own materials and methodology.
I haven't had much time to produce the final piece but I made a desk version that will show you how it looks at a smaller scale.
REFERENCE FOR THE DESIGN: Amy Cunningham's interlocking design series
Step 1: Meassure your wall
Now, it's up to you to decide how many modules you wish to have per row.
For example: If my wall is 6 ft W and I want to have 3 modules maximum per row, I will divide 6ft by 5 = 14.4 inches. The total size of each module will be 14,4 inch x 14,4 inch
Note: Remember that the internal size of the module decreases depending on the thickness of the material you choose. If my modules will be made out of cardboard, this material will be thinner than wood, therefore I need to measure the thickness of it and take it into consideration.
For example: If the size of one module is 14,4 inch x 14,4 inch and I am using a 1 inch thick material, I will have a 12,2 inch module [(14,4)-(2)]