Done, and please make a
review on my script
/because this is a new version of that script that waits to be approved/, and do NOT forget.. - you know what.
Check the resource page for more information about the script and also, the thing you needed is working like this:
<main command for broadcast>g 10,20,30 Hi! I am broadcasting this message
So, after the broadcast command just add letter "g" and then space and write your group IDs you want (in this case 10,20,30 separated by a comma, NOT space) and then a message.
The example above would send
orange message to all clients having at least one of those 3 groups in
red color.