Help Me On This Script?

On line 1, you're attempting to set the bariable to its position. Actually what you're doing is setting the actual Vector3 value. Your variable should be script.Parent.Torso, and go to TorsoPos.Position every time in the script. Check this out:

TorsoPos = script.Parent.Torso
SpizerMob = game.Lighting.Spizer
SpizerCount = math.random(1,4)

function SpizerSpawn()
    SpizerMob:clone().Parent = workspace
    wait(1)
    SpizerMob.Torso.Position = TorsoPos.Position
end

while wait(1) do
if script.Parent.Alien.Health < 1 then


if SpizerCount == 1 then
    SpizerSpawn()
elseif SpizerCount == 2 then
    SpizerSpawn()
    SpizerSpawn()
elseif SpizerCount == 3 then
    SpizerSpawn()
    SpizerSpawn()
    SpizerSpawn()
elseif SpizerCount == 4 then
    SpizerSpawn()
    SpizerSpawn()
    SpizerSpawn()
    SpizerSpawn()
end
end
     wait(1) --Also moved the wait down to make the wait apply every time the loop runs.
end