This is my first script. I didn't use any tutorial or anything. I kinda just typed a bunch of junk in, and it worked.
It makes it so you can only shoot 1 time per click. F11 is to turn it on and F12 is to turn it off. When you turn it on it makes your crosshairs as small as they can go, and when you turn it off they go back to your default size. This script is made for long range shooting. It's good for big maps like de_rats.