Script doesn't work whenever the player respawns, any clues on how to solve the issue?

Hello, so, I have a script that puts a GUI and some effects whenever the player's health is below or equals 15%, it works fine on the launch, but whenever the player respawns, the script stops working. The script is put into StarterPlayerScripts and is a LocalScript. Here's the code:

--vars
local L = game:GetService("Lighting")
local TS = game:GetService("TweenService")
local Plr = game:GetService("Players").LocalPlayer
local CC = Instance.new("ColorCorrectionEffect",L)
CC.Name = "NearDeathEffect"
local gui = Instance.new("ScreenGui",Plr.PlayerGui)
gui.IgnoreGuiInset = true
gui.Name = "NearDeathGUI"
gui.ResetOnSpawn = false
local vignette = Instance.new("ImageLabel",gui)
vignette.Size = UDim2.fromOffset(workspace.CurrentCamera.ViewportSize.X,workspace.CurrentCamera.ViewportSize.Y)
vignette.Image = "http://www.roblox.com/asset/?id=6301559916"
vignette.BackgroundTransparency = 1
vignette.ImageTransparency = 1
vignette.AnchorPoint = Vector2.new(.5,.5)
vignette.Position = UDim2.fromScale(.5,.5)
repeat wait() until Plr.Character
local percent = Plr.Character.Humanoid.Health/100
local neardeath = percent*15
local hum = Plr.Character.Humanoid
local nearDeath = false

hum:GetPropertyChangedSignal("MaxHealth"):Connect(function()
    print('max health changed, changing the percent.')
    percent = hum.Health/100
    neardeath = percent*15
end)

hum:GetPropertyChangedSignal("Health"):Connect(function()
    print('changed')
    if hum.Health <= neardeath and nearDeath == false then
        nearDeath = true
        print('near death')
        TS:Create(L.NearDeathEffect,TweenInfo.new(1,Enum.EasingStyle.Cubic,Enum.EasingDirection.Out,0,false,0),{Brightness = -.3, Saturation = -1}):Play()
        TS:Create(Plr.PlayerGui.NearDeathGUI.ImageLabel,TweenInfo.new(1,Enum.EasingStyle.Cubic,Enum.EasingDirection.Out,0,false,0),{ImageTransparency = 0}):Play()
    elseif hum.Health > neardeath and nearDeath == true then
        nearDeath = false
        print('regened out')
        TS:Create(L.NearDeathEffect,TweenInfo.new(2,Enum.EasingStyle.Cubic,Enum.EasingDirection.InOut,0,false,0),{Brightness = 0, Saturation = 0}):Play()
        TS:Create(Plr.PlayerGui.NearDeathGUI.ImageLabel,TweenInfo.new(2,Enum.EasingStyle.Cubic,Enum.EasingDirection.InOut,0,false,0),{ImageTransparency = 1}):Play()
    end
end)

hum.Died:Connect(function()
    print('died')
    TS:Create(L.NearDeathEffect,TweenInfo.new(3,Enum.EasingStyle.Cubic,Enum.EasingDirection.In,0,false,0),{Brightness = -1}):Play()
    wait(game:GetService("Players").RespawnTime+1)
    nearDeath = false
    TS:Create(L.NearDeathEffect,TweenInfo.new(2,Enum.EasingStyle.Cubic,Enum.EasingDirection.Out,0,false,0),{Brightness = 0, Saturation = 0}):Play()
    TS:Create(Plr.PlayerGui.NearDeathGUI.ImageLabel,TweenInfo.new(2,Enum.EasingStyle.Cubic,Enum.EasingDirection.InOut,0,false,0),{ImageTransparency = 1}):Play()
end)