Letters appear while starting up
So, my Mac suddenly got strange letters while starting up. Cant say much because I don't understand whats happening, but here is a image that shows:
http://i19.photobucket.com/albums/b161/Ayame-Sama/Mobile%20Uploads/image_zps5003 82e4.jpg
I cant open Disk Utility and cant safe boot. Please help!! ):
I wasnt doing anything different from normal, i was looking tá facebook the time this happened
MacBook Pro (13-inch Mid 2012), OS X Mavericks (10.9.2)