Question about Counterstrike and Steam

Ok, I have the first Counterstrike and am trying to get to where I can play online with Steam. I donwloaded steam, installed Counterstrike, updated CS, and when I go to play, my screen shows nothing but colors everywhere, but I can see the menu. I can see the servers, and when I click on them to join, I go to the screens where it says downloading resources and after I get them, CS closes by itself when its just about to let me play.

How can I get it to run?