If you are looking at a file like killsay (1).lua , it likely contains these elements:

It triggers a command to send a string of text to the in-game chat. 2. Common Script Components

Many scripts include a menu where you can toggle the killsay on/off or edit the message list directly in the code using a text editor like Visual Studio Code. 4. Customizing Your Messages

Crosshair X Overlay - Custom crosshair on every game