radio message when activating a script

[K6 0]

How can I make a radio sentence seen by the player if there is a script started.....How do I write it in the script...(no trigger used!!!)

[Space Cadet 1]

The syntax is exactly the same in a script as it is in the editor, apart from you don't need a ";" after each command, just put each command on a new line.

Unitname sidechat "Message"