{ANSWERED} I made a visualizer script. How do i make it so it works?

This is the script so far. I want to make it inside workspace but the size is not changing. btw the scriptype is not a local script. its a normal

local oof = Instance.new("WorldModel",workspace)
oof.Name = "Visualizer"
local p = Instance.new("Part",oof) 
local s = Instance.new("Sound",p) 
p.Anchored = true
p.Position = Vector3.new(-51.615, 0.055, 88.5) 
s.SoundId = "rbxassetid://478553966" 
s.Playing = true 
s.Looped = true 
p.Shape = Enum.PartType.Cylinder 
p.Orientation = Vector3.new(0, 180, -90) 
repeat wait() 
p.Size = Vector3.new(0.15, s.PlaybackLoudness/15, s.PlaybackLoudness/15) 
until nil == 1