Roblox HeadSquish script

plr=game.Players.LocalPlayer
w=Instance.new("Weld", plr.Character.Head)
w.Part0 = plr.Character.Head
w.Part1 = plr.Character.Torso
w.C0 = CFrame.new(0,-1.5,0) * CFrame.Angles(0,0,0)
num = -3
while true do
for i = 1, 8 do
wait()
num = num + 1
w.C0 = CFrame.new(0,-1.5,0) * CFrame.Angles(math.pi/180*num*8,0,0)
end
for i = 1, 8 do
wait()
num = num - 1
w.C0 = CFrame.new(0,-1.5,0) * CFrame.Angles(math.pi/180*num*8,0,0)
end end