Visualizer script doesnt work as intended?

So I made a script that's supposed to make every part in a model change their Y size to the PlaybackLoudness of a sound

local s = workspace.Sound
wait(2)
for i,p in pairs(workspace.q:GetChildren()) do
        while wait() do
            p.Size =  Vector3.new(1,s.PlaybackLoudness/math.random(100,250),1)
        end
end

The script is a local script and parented under replicatedfirst.