Server Side

iCounter = 0;

function createRandomPed()
    local player = getRandomPlayer();
    if not player then
        return;
    end
    local x,y,z = getElementPosition(player);
    x = x + math.random(-50,50);
    y = y + math.random(-50,50);
    z = z + 5;
    iCounter = iCounter + 1;
    createPed(iCounter%200,x,y,z);
end

function destroyRandomPed()
    for i,ped in ipairs(getElementsByType("ped")) do --this way it destroys less peds when there is not many peds.
        if math.random(0,5) == 1 then
            destroyElement(ped);
            return;
        end
    end
end

function keepPedsBelowHundred()
    local iCount = #getElementsByType("ped");
    if iCount > 99 then
        for i,ped in ipairs(getElementsByType("ped")) do
            if math.random(0,1) == 1 then
                destroyElement(ped);
            end
        end
    end
end

function setPedSyncer()
    for i,ped in ipairs(getElementsByType("ped")) do
          setElementSyncer(ped,getRandomPlayer());
    end
end

-- function init()
--  done in onResourceStart
-- end

addEventHandler("onResourceStart",getResourceRootElement(),
    function()
        setTimer(createRandomPed,100,0);
        setTimer(destroyRandomPed,200,0);
        setTimer(keepPedsBelowHundred,1000,0);
    end);