In Capture the Flag, Team Deathmatch or any other team related gametype it is important to let the teammates know where you are or where you have seen the flag.
For this, id software designed a little entity called target_location. You place it somewhere in the area, the player comes near and set a "message"-key.
If you want a colored display you use "color" as a key and type in the numbers from 1 to 7. (see picture above). The nearest