Gray screen is loading in looping

[dnfoz]

Installed the Mavericks, so that in the apple screen it is charging and does not go

 

I've tried the way - S to type these commands

 

 

fsck -fy

mount -uw /

mkdir /intelhd_backup

cd /System/Library/Extensions

mv AppleIntelHD* AppleIntelSNB* /intelhd_backup

reboot

 

 

But the keyboard of my laptop stopped working this mode

 

I tried an external USB keyboard, but dont work too

 

 

how am I typing commands in -s is not the right?