can i have the script for the crosshair to change colors?
The script is in the attachments of this post.
1. Rename the file-type to .cfg, so "rainbow_xhair.cfg"
2. You will want to add it to Steam\SteamApps\common\Counter-Strike Global Offensive\csgo\cfg
3. After you've done that, add:
exec rainbow_xhair.cfg
to your autoexec.cfg like so:

4. Boot up your game, open the command screen using '~' and type
exec autoexec
And you're good!