When i boot up my MacBook it flashes a file with a question mark. I think I somehow erased some of my files or maybe because I (or my mom) accidentally closed the lid while in recovery. i have done `Command`-`Option`-`R` at start-up and then got stuck on the screen that said to pick a drive to install OS X Yosemite.

I tried to use the same commands `Command`-`Option`-`R` but it shows an error sign on the spinning globe and apple.com support. I'm stuck. Please help. I hate not being able to use my Mac. Thanks.