It works in a script but not a LocalScript. Why is this?

It works in a script but not a LocalScript. Why is this, and how do I fix it?

local db = false 

function onTouched(Part)
    if db then return end 
    db = true 
    if Part.Parent:FindFirstChild("Humanoid") and game.Players:GetPlayerFromCharacter(Part.Parent) then 
        local plr = game.Players:GetPlayerFromCharacter(Part.Parent) 
        if plr.PlayerGui:FindFirstChild("onTouchSound") then return end
        local sound = script.Sound:Clone() 
        local a = script.ScreenGui:Clone()
        a.Parent = plr.PlayerGui
        sound.Parent = plr.PlayerGui
        sound.Name = "onTouchSound"
        sound.TimePosition = 74.8        
sound:Play() 
sound.TimePosition = 74.8  
for i = 0, 1, .01 do
    sound.Volume = i
    wait()
end


    end
    wait(2) 
    db = false

end

script.Parent.Touched:connect(onTouched)