Raid invite macro

[Voxxel]

Hello!

"All max level character will be invited to raid in 10 sec. Please leave your groups."

I'm looking for a script to be able to to do mass invites for guildies similar to DBM's mass invite above, but with another guild chat warning text and other level range.

Fore example "For the X event discussed on the forum, all players between level 70 and 80 will be invite in 10 sec." -> then the script invites all guildies in that level range in 10 sec.

Is that possible to do with a script? I really dont want to install justanoherusefuladdon since I got plenty already.

Thanks!