Why does my food system work once?

Alright I'm implementing a food system into my game and it works fine, but when I die it just stops updating the GUI I have set up. Please help.

Code:

wait(1)
local player = game.Players.LocalPlayer
local hungerLevels = {full = true, kindof = false, hungry = false, starving = false, dying = false, dead = false}

local function check()
    if hungerLevels.dead then
        player.PlayerGui.MainUI.ScreenGui.Frame.HungerInteger.Text = "Dead"
        local calculateDamage = 100 - player.Character.Humanoid.Health
        player.Character.Humanoid:TakeDamage(calculateDamage)
        else if hungerLevels.dying then
            player.PlayerGui.MainUI.ScreenGui.Frame.HungerInteger.Text = "Dying"
            local message = Instance.new("Message", game.Workspace)
            message.Text = "YOU ARE DYING OF STARVATION! GO EAT!!!"
            wait(3)
            message:Destroy()
            else if hungerLevels.starving then
                player.PlayerGui.MainUI.ScreenGui.Frame.HungerInteger.Text = "Starving"
                else if hungerLevels.hungry then
                    player.PlayerGui.MainUI.ScreenGui.Frame.HungerInteger.Text = "Hungry"
                    else if hungerLevels.kindof then
                        player.PlayerGui.MainUI.ScreenGui.Frame.HungerInteger.Text = "Okay" 
                        else if hungerLevels.full then              
                            player.PlayerGui.MainUI.ScreenGui.Frame.HungerInteger.Text = "Full"                     
                        end                 
                    end             
                end
            end
        end
    end
end

local function starvationSystem()
    check()
    wait(60)
    hungerLevels.full = false
    hungerLevels.kindof = true
    check()
    wait(60)
    hungerLevels.kindof = false
    hungerLevels.hungry = true
    check()
    wait(60 * 2)
    hungerLevels.hungry = false
    hungerLevels.starving = true
    check()
    wait(60 * 2)
    hungerLevels.starving = false
    hungerLevels.dying = true
    check()
    wait(60 * 3)
    hungerLevels.dying = false
    hungerLevels.dead = true
    check()
end

while player.Character.Humanoid.Health > 0 do
    starvationSystem()
end