Hello Mazal.
O.k that is part of Linux
First the part with the background:
right click on the 2 black cubs and properties/advance look like that:were you see the 4-you have just 2 change the number to 4.
that is all in that part.
the next part is that configuration that i have post,
you will have to change the desktop wall to the cube.
don't forget to disable the minimize affect.
hope it is more clear now.