Can someone help me move a model from one place and back again?

I have this basic script that's meant to move a model from point A to point B. Here it is:

X=script.Parent

while true do
wait()
for i= 1,10 do
X:TranslateBy(Vector3.new(0, 0, -464.487))
wait(1)
end
for i= 1,10 do
X:TranslateBy(Vector3.new(0, 0, 464.487))
wait(1)
end
end

What I need to script is a model moving a moderate speed, flying over to one place and then shifting back to its original position. Instead, my script teleports it 4 times, eventually making it's destination, and teleporting back the same way. May someone help me fix this script?