Scripts for beginners. Auto-translated

I read somewhere that you should write not
startThread( "replacecreature" )
but
startThread( replacecreature)
I tried this option too, but it didn't work either.

However, the code I wrote has a weak point. I suspect that you don't actually have 9999 archers. It will throw an error. You need to check the exact number of archers and subtract that exact number! If the point is that there should be no more of them in the army. But for now, just check without subtracting the archers.

Well, please provide what the console says. You can find instructions on how to enable it in the FAQ.

function replacecreature()
    while (1) do
    sleep(2);
    local herocr = GetHeroCreatures( "Sarge", CREATURE_ARCHER );
    if herocr >= 1 and 
GetTownBuildingLevel("cheast_town", TOWN_BUILDING_DWELLING_2 ) == 2 then
        RemoveHeroCreatures( "Sarge", CREATURE_ARCHER, herocr );
        AddHeroCreatures( "Sarge", CREATURE_LONGBOWMAN, herocr );
        sleep(1);
        break
     end;
    end;
end;

startThread(replacecreature);

Why use == instead of =?

And what needs to be done to make the script run constantly (while the building is constructed), and not just once?

If you need to constantly replace archers with crossbowmen, just remove the "break" from the 32Metra code.

We need to figure out one more thing: is it possible to allow infinite building through scripts or some other means, instead of one building per day (preferably in a specific city, but if that's not possible, then it's acceptable for all cities)?

Is it possible to bypass this limitation in some clever way, for example, by using a script to quickly exit and re-enter the city (although this seems impossible), but maybe someone has other ideas?