I finally figured out what was wrong with my computer so here is my progress on my cardboard sculpture.

I made 16 of these and attached them on the corners of the sides.

These pieces are for the top and bottom of my cube.

I painted the main part black and the corners white with purple diamonds. I made the swirls with hot glue so that my box wouldn't be really boring.  I also started putting all the pieces together to make my cube today.