DIY modern wall unit

I was going to use popsicle sticks or strips of cheap wood to make a wall unit like the first one below, but the supports would have been a pain. For now I'm happy with my easier version. I bought a set of accessories (Re-ment Room 002) from Japan, which included four little shelving cubes. I simply attached them with a bit of double-sided tape. Piece of cake. I do wish it came with one more cube, though.