How to make a script fire everytime a player dies?

game.Players.PlayerAdded:Connect(function(player)
    local plrname = player.Name
    local humanoid = game.Workspace:WaitForChild(plrname)
    local hum = humanoid:WaitForChild("Humanoid")

    local function onCharacterAdded(character)
    end

    player.CharacterAdded:Connect(onCharacterAdded)

        if player.Character then

        -- my code --

         end
end)

I tried using this but it only works once