Why isn't my gui appearing again after the player resets or dies?

Alright, so I have this health gui local script and it has the extra ability to identify the player's team by changing it's frame color for example to red or blue and the problem i'm having that it's not appearing when the player resets and there's no even a single error appearing in Output that I can idenfity it's problem, please help any kind of assistance would be appreciated.

while game.Workspace:FindFirstChild(game.Players.LocalPlayer.Name)==nil do 
    game:GetService("RunService").RenderStepped:wait()

end
while game.Workspace:FindFirstChild(game.Players.LocalPlayer.Name):FindFirstChild("Humanoid")==nil do 
    game:GetService("RunService").RenderStepped:wait()
end





    script.Parent:WaitForChild("HPVisual")
    script.Parent:WaitForChild("HPLabel")
    script.Parent:WaitForChild("Critical")
    script.Parent:WaitForChild("HPOutline")
    script.Parent.Parent:WaitForChild("Background")
coroutine.resume(coroutine.create(function()
while true do
    game.StarterGui:SetCoreGuiEnabled(Enum.CoreGuiType.Health, false)
    game:GetService("RunService").RenderStepped:wait()
    if script.Parent.HPVisual.ImageColor3==Color3.new(1,0,0) then
if script.Parent.Critical.ImageTransparency==1 then
    script.Parent.Critical.ImageTransparency=0
else
    script.Parent.Critical.ImageTransparency=1
end
wait(0.15)
end
end
end))
game:GetService("RunService").RenderStepped:connect(function()
if game.Players.LocalPlayer.Character.Humanoid.Health<=0 then
script.Parent.Visible=false
script.Parent.Parent.Background.Visible=false
end
script.Parent.Parent.Background.BackgroundColor3=game.Players.LocalPlayer.TeamColor.Color
if game.Players.LocalPlayer and game.Players.LocalPlayer.Character and game.Players.LocalPlayer.Character:FindFirstChild("Humanoid") then
local percent=(math.floor(game.Players.LocalPlayer.Character.Humanoid.Health)/math.floor(game.Players.LocalPlayer.Character.Humanoid.MaxHealth))
script.Parent.HPVisual.ImageRectOffset=Vector2.new(0,((1-percent)*100))
script.Parent.HPVisual.Size=UDim2.new(1,0,percent,0)
script.Parent.HPVisual.Position=UDim2.new(0,0,1-percent,0)
script.Parent.HPLabel.Text=math.floor(game.Players.LocalPlayer.Character.Humanoid.Health)
if math.floor(game.Players.LocalPlayer.Character.Humanoid.Health)<2 and math.floor(game.Players.LocalPlayer.Character.Humanoid.Health)>0 then
script.Parent.HPLabel.Text=1
end
if percent<0.02 and percent>0 then
    percent=0.01
end
if percent<=0.5 then
script.Parent.HPVisual.ImageColor3=Color3.new(1,0,0)
script.Parent.Critical.Visible=true
else
script.Parent.HPVisual.ImageColor3=Color3.new(1,1,1)
script.Parent.Critical.Visible=false
end
end
end)