[Snod]

It is widely known that 1-1-1 is a painful build for protoss to handle. But there are ways to deal with it, especially at a non-pro level, as the build won't be 100% perfect.
The main thing you want to do is keep stalling the terran army out before they get to your base, and forcing PDD early if they have a raven. This way you can get enough units by the time they get to your doorstep.

Quick Comments

Stallion:

a basic and simple wayt o deal with it :) doesnt always work but good idea :)