When hurt, screen flashes red with intensity depending on health. Also, consecutive shots received stacks the red. This script is really just one of those small ones that feel like it is integrated into the game.
This script is quite simple, and very editable.
Tested in Counter-Strike: Source, should work with any server with eventscripts 2.0+
Please +w00t if ya like it!
TODO:- Make it have a configuration instead of manual code editing.