How can I get this piano working again or is it beyond the point of repair?

Hey, guys! I'm here due to my script not being able to work. The piano is supposed to play a sound (note) when you press certain keys on your keyboard but as you can see, it is not working. Please help because I have no clue why this isn't working.

Here are my scripts.

Normal script:

wait(5)
local KeyTool = script["PianoPlayer V1.1"]:Clone()
script["PianoPlayer V1.1"]:Remove()
position = script.Parent.Archive.Position
local frame = Instance.new("CFrameValue")
frame.Name = "OriginCFrame"
frame.Value = script.Parent.Archive.CFrame
frame.Parent = script.Parent

local object = Instance.new("ObjectValue")
object.Value = script.Parent.Parent.Parent

seat = script.Parent.Seat

function onSitUp(child, hopper, piano, object)

    if child.Parent == nil then
        hopper:Remove()
        object:Remove()
        --script.Parent.Parent.Parent = game.Workspace
    end
end

function onChildAdded(part)
    if part.className == "Weld" then
        local torso = part.Part1
        if torso ~= nil then
            local parent = torso.Parent
            --[[if parent ~= nil then
                script.Parent.Parent.Parent = parent
            end]]
            local char = torso.Parent
            local player = game.Players:GetPlayerFromCharacter(char)
            if player ~= nil then
                local hopper = KeyTool:clone()
                hopper.Parent = player.Backpack
                local object = script["Instrument"]:clone()
                object.Value = script.Parent.Parent
                object.Parent = char
                part.AncestryChanged:connect(function(child) onSitUp(child, hopper, script.Parent.Parent, object) end) 
            end
        end
    end
end

seat.ChildAdded:connect(onChildAdded)
seat.BrickColor = BrickColor.new("Really black")

Main Script:

bin=script.Parent

function findPiano(player)
    local list = player.Character:GetChildren()
    for x = 1, #list do
        if (list[x].Name == "Instrument") then
            local weld = list[x].Value:FindFirstChild("Parts"):FindFirstChild("Seat"):FindFirstChild("SeatWeld")
            if (weld ~= nil) and (weld.Part1 == player.Character:FindFirstChild("Torso")) then
                return list[x].Value
            end
        end
    end
--  return nil
end

function onSelected(mouse)
    mouse.Icon = "rbxasset://textures\\GunCursor.png"
    mouse.KeyDown:connect(onKeyDown)
end

function onKeyDown(key)
    if (key~=nil) then
        key = key:lower()
        local piano = findPiano(script.Parent.Parent.Parent)
        if (piano==nil) then return end
        parts = piano.Parts
        local archive = piano.Parts.Archive
            if (key=="a") then
                archive:findFirstChild("0").Run.Value = true
            end
            if (key=="w") then
                archive:findFirstChild("0s").Run.Value = true
            end
            if (key=="s") then
                archive:findFirstChild("1").Run.Value = true
            end
            if (key=="e") then
                archive:findFirstChild("2b").Run.Value = true
            end
            if (key=="d") then
                archive:findFirstChild("3").Run.Value = true
            end
            if (key=="f") then
                archive:findFirstChild("4").Run.Value = true
            end
            if (key=="t") then
                archive:findFirstChild("4s").Run.Value = true
            end
            if (key=="g") then
                archive:findFirstChild("5").Run.Value = true
            end
            if (key=="y") then
                archive:findFirstChild("5s").Run.Value = true
            end
            if (key=="h") then
                archive:findFirstChild("6").Run.Value = true
            end
            if (key=="u") then
                archive:findFirstChild("6s").Run.Value = true
            end
            if (key=="j") then
                archive:findFirstChild("7").Run.Value = true
            end
            if (key=="z") then
                archive:findFirstChild("8").Run.Value = true
            end
            if (key=="x") then
                archive:findFirstChild("8s").Run.Value = true
            end
            if (key=="c") then
                archive:findFirstChild("9").Run.Value = true
            end
            if (key=="v") then
                archive:findFirstChild("9s").Run.Value = true
            end
            if (key=="b") then
                archive:findFirstChild("10").Run.Value = true
            end
            if (key=="n") then
                archive:findFirstChild("11").Run.Value = true
            end
            if (key=="m") then
                archive:findFirstChild("11s").Run.Value = true
            end
    end
end

bin.Selected:connect(onSelected)

Lighting script:

script.Parent.Parent = game:service("Lighting")
script.Parent = nil

Sound Script:

--ToolSoundScript V1.2
--funtimecameron886
wait(2)

local Sound = script.Parent                                 --Defines Sound
local Bool = Sound.Run                                  --BoolValue activated by outside script to request sound


function Play()
    wait()
    if Bool.Value == true then
        Sound:Play()                                    --Plays the sound
        wait()
        Bool.Value = false
    end
end


Bool.Changed:connect(Play)

Hope you guys know how to solve this!