Sakura-Chan , heres how to get my current blog design.
The gackt photo u can save it directly, by rightclicking the photo and press save.
For the upper top background, go to your blog tabs and press design, and after that, press template design.
Go to Background and choose abstract and select the first one.
After that, go to Advanced and press Background. Then, you can choose black colour to be like mine. Heres the tip, remember to tick the box called Transparent there.
Next, go to ''Add CSS'' under the same Advanced tab.
erase everything there and copy this code there :
.body-fauxcolumn-outer {
background: url(http://images2.layoutsparks.com/1/220858/black-rose-floral-design-1.jpg);
}
.body-fauxcolumn-outer div {
background: none;
}
Save everything after that and apply!~
If there any problem feel free to tell me at my Chatbox, Twitter or Facebook ^o^