Crosshair Commands For Gary's Mod

Having some issues with crosshair adjustment commands on Gary’s Mod:

So tried to put in some crosshair commands to adjust color and size and inadvertently got rid of the reticle all together and I have no idea how. Tried to look up other commands that people claimed worked and the console replied with unknown command. I tried to download a custom crosshair add-on but don’t know where to put the file to allow it to work. If anyone could help me out with either the correct commands to adjust my crosshair or easy add-ons that’d be great.