reinstall mavericks without internet connection

hello , i have a MacBook Pro 13 , and i want to reinstall my mavericks but i search on the internet and i see that it download it and install it aftert it format the hardisk and begin to install the mavericks . the problem is that i don't have fast connection and maybe the electric turn of in sometimes . i afred that my connection lost in the installing proceser , i need a way that i can install the mavricks without internet connection . 🙂 ,