if (isNil "zombieshield") then {zombieshield = true;} else {zombieshield = !zombieshield};
if(zombieshield) then {titleText ["Zombie Shield activated!","PLAIN DOWN"]; titleFadeOut 4;};

while {zombieshield} do {

_pos = getPos player;
_zombies = _pos nearEntities ["zZombie_Base",10];
_count = count _zombies;

for "_i" from 0 to (_count -1) do
{  
_zombie = _zombies select _i;  
_zombie setDamage 1;
RandomHeadshots=round(random 4);
if (!alive _zombie) then {
zombiekills = player getVariable["zombieKills",0];
player setVariable["zombieKills",zombiekills+1,true];
If (RandomHeadshots==1) then {
_headShots = player getVariable["headShots",0];
player setVariable["headShots",_headShots+1,true]
};
};
};
};
titleText ["Zombie Shield deactivated!","PLAIN DOWN"]; titleFadeOut 4;