Help with while loop. (SOLVED)

[Boogiepop210]

function Formula(prefab, u1, u2, xRange, yRange)
    local player = ThePlayer
    local playerPos = player:GetPosition()
    for x = -xRange, xRange do
     for y = -yRange, yRange do
        local z = math.abs(x-u1) + math.abs(y - u2)
        while z == 1 do 
        local spawnPos = Vector3(playerPos.x+x, playerPos.y, playerPos.z+z)
        SpawnPrefab(prefab).Transform:SetPosition(spawnPos:Get())
   end
  end
 end
end

So, I'm trying to make a square of sandspikes with this command, but whenever I use it, it goes on infinitely and crashes.

I've been using it like this: Formula("sandspike", 1, 1, 1, 1)

 

Sorry if this is insanely obvious, I've never used while loops lol.

[Boogiepop210]

nvm I found a different method so it's fine.

[Yuuko]

What is changing the Z value?  The while loop repeats until something changes Z to not longer equal one and I don't see anything changing that.

idk lua so there may be some language thing I'm missing where this is not the correct answer, but in the languages I do use the while loop must include an iteration or it will be infinite (or never proc depending)

Also - do you actually need a while loop here?  The do x and do y are iterating over your position, what is the while loop repeating for?