Why doesn't this death script work?

local player = game.Players.LocalPlayer
repeat wait() until player:FindFirstChild("leaderstats")
    local lives = player.leaderstats.Respawns
    player.CharacterAdded:connect(function(character)
        character:FindFirstChild("Humanoid").Died:connect(function()
            wait()
            lives.Value = lives.Value - 1
            player:FindFirstChild("Backpack").Death:Play()
            wait(1)
            children = player.Backpack:GetChildren()
            for _,v in pairs(children) do
                if v:IsA("Sound") then
                    repeat
                        wait()
                        v:Stop()
                    until v.IsPlaying == false 
                end
            end
        end)
    end)

This is in a LocalScript in the Starterpack (a LocalScript will help me the best, so don't suggest a server script). It's supposed to cut off 1 life from your stats, and play a sound. It does neither of these, for some reason.

I kind of remade your script, the coding is untested, but I think it works (Sorry if didn't help, bit tired. ;-; );

repeat wait(0) until game.Players.LocalPlayer and game.Players.LocalPlayer.Character and game.Players.LocalPlayer.Character:FindFirstChild("Humanoid") and script and script.Parent and game.Players.LocalPlayer:FindFirstChild("leaderstats") and game.Players.LocalPlayer.leaderstats:FindFirstChild("Respawns") and game.Players.LocalPlayer:FindFirstChild("Death")

local plr = game.Players.LocalPlayer
local char = plr.Character
local hum = char.Humanoid
local stats = plr.leaderstats
local respawns = stats.Respawns

wait(0)
plr.Death:Stop() --This will stop the Sound named 'Death' from looping/playing when the player respawns (Within LocalPlayer)
wait(0)

local function onDeath()
if hum.Health <= 0 then
if respawns.Value > 0 then
respawns.Value = respawns.Value - 1
for i,v in pairs(plr:GetChildren()) do if v:IsA("Sound") then repeat wait(0) v:Stop() until v:Stop() or not v.IsPlaying end end
plr.Death:Play()
else
print("Out of respawns")
for i,v in pairs(plr:GetChildren()) do if v:IsA("Sound") then repeat wait(0) v:Stop() until v:Stop() or not v.IsPlaying end end
plr.Death:Play()
-- Rest of coding
end
end
end;

hum.Changed:connect(onDeath);

Sorry if wasn't very useful, didn't explain well, coded the code wrong, or the code didn't work, a bit tired tonight for some reason. ;-; Hope this helped!

Maybe try putting it in lighting instead. Thats what I think but im not no pro scripter.