Local Script Creating Values Help?

So I need a bunch of values from this local script I made. It 'Instance.news' all of them, and when I check the player, it works fine and it has all of the values.

The problem is, if the player dies, then they clone, making 2 pairs of each value, and it goes on

Is there any way to stop this from happening? I only want 1 of each value

This is the script:

player = script.Parent.Parent

local Heavy = Instance.new("BoolValue",player)
Heavy.Name = "Heavy"

local Scout = Instance.new("BoolValue",player)
Scout.Name = "Scout"

local Medic = Instance.new("BoolValue",player)
Medic.Name = "Medic"

local Builder = Instance.new("BoolValue",player)
Builder.Name = "Builder"

local Speed = Instance.new("NumberValue",player)
Speed.Name = "Speed"

local Health = Instance.new("NumberValue",player)
Health.Name = "Health"

Tested and everything. Works just as described. Hints in the script explain how it is done.

Make sure that this is in a LocalScript in StarterGui

--Scripted by EncryptX [11-30-14]
local player = script.Parent.Parent
local item1;
if not player:findFirstChild("Heavy") then --Check for already existing item
local Heavy = Instance.new("BoolValue",player)
Heavy.Name = "Heavy"
else
item1 = player.Heavy
end

local item2;
if not player:findFirstChild("Scout") then
local Heavy = Instance.new("BoolValue",player)
Heavy.Name = "Scout"
else
item2 = player.Scout
end

local item3;
if not player:findFirstChild("Medic") then
local Heavy = Instance.new("BoolValue",player)
Heavy.Name = "Medic"
else
item3 = player.Medic
end

local item4;
if not player:findFirstChild("Builder") then
local Heavy = Instance.new("BoolValue",player)
Heavy.Name = "Builder"
else
item4 = player.Builder
end

local item5;
if not player:findFirstChild("Speed") then
local Heavy = Instance.new("BoolValue",player)
Heavy.Name = "Speed"
else
item5 = player.Speed
end

local item6;
if not player:findFirstChild("Health") then
local Heavy = Instance.new("BoolValue",player)
Heavy.Name = "Health"
else
item6 = player.Health
end