Weird Crash bugs in the latest snapshot

At first I loaded my Minecraft, got onto my world, and after a few seconds my screen suddenly changes to a crazy striped pattern! I was forced to reset my computer, and it seemed like everything was fine, but not for long. I was playing, and suddenly my screen blacks out, when it comes back my computer says "Your display driver stopped working, but fixed itself. This happened repeatedly, so i just quit. Help!