First, copy rocket dock skin file that I named Xircuitx here.
Then go to C:\Program Files (x86)\RocketDock\Skins this path if you have already installed rocketdock on your pc...
Paste the file and go to dock settings from the main programme choose style and from the theme section choose Xircuitx...
Click ok and you are done..

Have FUN...☺♥☺