How do you make things move with local scripts? [SOLVED]

So I'm basically making this obby game with different worlds and stuff. For some reason, all of my levels/worlds are always lagging when I play it in roblox player, but not when I run it in the studio. I'm pretty sure this isn't a building problem because they only have around 400 parts.

Also, it's only the moving parts that lag, not player movement or anything.

Here's the script:

(Rotating script for hammer obstacles)

model = script.Parent
model.PrimaryPart = model.PrimaryP

while true do
	for i=1, 13, 1 do -- 1+2+...+12+13 = 90 degrees
		script.Parent:SetPrimaryPartCFrame(script.Parent:GetPrimaryPartCFrame() * CFrame.Angles(0, 0, math.rad(i)))
		wait()
	end
	wait(2)
	for i=1, 13, 1 do
		script.Parent:SetPrimaryPartCFrame(script.Parent:GetPrimaryPartCFrame() * CFrame.Angles(0, 0, math.rad(-i)))
		wait()
	end
	wait(2)
end

I did some research and apparently it's better if you put these in local scripts (currently are regular scripts). I'm not sure if this is the problem, but when I tried to put this in a local script, nothing moved.

Nvm I figured it out, you're supposed to put the local scripts into the player or character scripts folder.