Checkpoint dont work well (color and sound) can someone help me please?

Hey I am making a obby with checkpoints, the problem is, when someone touch the checkpoint, everybody hear the sound he made and everybody see the checkpoint turn to green, I have already tried to to put the two following scrippts in local script but its dont work. Theres the scripts: the sound script:

local part = script.Parent
local runnable = false
local player = game.Players.LocalPlayer

game.Players.ChildAdded:Connect(function(player)
    part.Touched:Connect(function(Hit)
        if not runnable then
            runnable = true
            if Hit.Parent:FindFirstChild("Humanoid") ~= nil then
                local sound = script.Parent.Checkpoint

                if not sound.IsPlaying then
                    sound:Play(player)
                end
            end
        end
    end)
end)

the color script:

local part = script.Parent
local player = game.Players.LocalPlayer

game.Players.PlayerAdded:Connect(function(player)
    part.Touched:Connect(function(Hit)
        script.Parent.BrickColor = BrickColor.new("Lime green")
    end)
end)

and the checkpoint script (in serverscript services):

local checkpoints = workspace:WaitForChild("Checkpoints droite")
local remoteEvent = game.ReplicatedStorage:WaitForChild("ResetStatEvent") -- Again, you can use any name here

game.Players.PlayerAdded:Connect(function(player)
    local leaderstats = Instance.new("Folder")
    leaderstats.Name = "leaderstats"
    leaderstats.Parent = player

    local stage = Instance.new("IntValue")
    stage.Name = "Stage"
    stage.Value = 0
    stage.Parent = leaderstats

    player.CharacterAdded:Connect(function(char)
        local hum = char:WaitForChild("Humanoid")
        wait()
        char:MoveTo(checkpoints[stage.Value].Position)

        hum.Touched:Connect(function(hit)
            if hit.Parent == checkpoints then
                if tonumber(hit.Name) == stage.Value + 1 then
                    stage.Value = stage.Value + 1
                end
            end
        end)
    end)
end)

-- Added code here
remoteEvent.OnServerEvent:Connect(function(plr)
    if plr and plr.Character and plr.Character:FindFirstChild("Humanoid") then
        local humanoid = plr.Character.Humanoid
        plr.leaderstats.Stage.Value = 0
        humanoid.Health = 0
    end
end)

Thanks you in advance!