how to trigger the big yellow messages?

[David198502]

i have a training mission, where both sides have a restricted plane amount for their spawn areas(20 planes).
now i want that if one of both spawn areas has only 10 planes left, that a message pops up, warning the team just like "team red only 10 planes left"(although i would like to have this message visible for everybody)
and i want another message to pop up, when eventually one spawn area has all available plane used and when all planes of one side are destroyed just like "team blue has lost the war"

Edit: ok i just found out, that the limit of planes of a spawn area doesnt seem to work...
i restricted one spawn area to only 1 plane, but i could spawn several times from the same area without problems