Hint when all missions done

[Mladja-ArmASerbia 3]

I made couple of missions to spawn one by one, something like in domination.

But i want when all mission are spawned to get hint that are all mission finished.

Heres my script.

sleep 10;
[EAST,"HQ"] sideChat "Uskoro Misija...";
sleep 4;
[EAST,"HQ"] sideChat "Proveri Mapu...";
hint "Proveri mapu i Zadatke";
sleep 1;

_missions = ["scripts\missions\mission1.sqf","scripts\missions\mission2.sqf","scripts\missions\mission3.sqf"];
_spawn = _missions select (floor(random(count _missions)));
[] execVM _spawn;

if (_missions == 0) exitWith {titleCut ["All Missions are Done. Congratulations.", "PLAIN DOWN", 1]};

Missions spawn random every time, but how to make when they are all spawned to get hint.

Also how to get to spawn only one time, at my script missions are spawned constantly.

Thanks.

[BoltboxerPro 1]

I had this problem till a guy called LockJaw-65- showed me his script. It selects each mission randomly, once and gives you a hint when its done. http://forums.bistudio.com/showthread.php?152082-Make-objectives-random&p=2360085#post2360085