HELP?, script crashes players when joining!

I made a gui and a joinhandler(with values and stuff) the gui has a script that gets information from some values

local tool = script.Parent.Parent.Parent.Tool
local ammo = script.Parent.Parent.Parent.Tool.Ammo
local gui = script.Parent
local armor = script.Parent.Parent.Parent.Armor
local clip = script.Parent.Parent.Parent.Tool.Clip

while true do
	if tool.Value == "Hands" then
		gui.Index.Screen.Title.Text = "Hands - No Tool"
		gui.Index.Screen.Ammo.Visible = false
		gui.Index.Screen.Ammo2.Visible = false
		gui.Index.Screen.Controls.Visible = false
		gui.Index.Screen.LEFT.Visible = false
		gui.Index.Screen.RIGHT.Visible = false
		gui.Index.Screen.MODE.Visible = false
		gui.BG:TweenPosition(UDim2.new(1, -325, 1, -75))
		gui.Index:TweenPosition(UDim2.new(1, -310, 1, -60))
	elseif tool.Value == "Test"	 then
		gui.Index.Screen.Title.Text = "Test - ammothing"
		gui.Index.Screen.Ammo.Visible = true
		gui.Index.Screen.Ammo2.Visible = false
		gui.Index.Screen.Controls.Visible = true
		gui.Index.Screen.LEFT.Visible = false
		gui.Index.Screen.RIGHT.Visible = false
		gui.Index.Screen.MODE.Visible = true
		gui.Index.Screen.Ammo.Text = ammo.Value.."/"..clip.Value
		gui.BG:TweenPosition(UDim2.new(1, -325, 1, -125))
		gui.Index:TweenPosition(UDim2.new(1, -310, 1, -110))
	end
	if armor.Value == "0" then
		gui.Index2.Armor.Visible = false
		gui.Index2.ARMOR.Visible = false
		gui.BG:TweenPosition(UDim2.new(0, 0, 1, -75))
		gui.Index:TweenPosition(UDim2.new(0, 20, 1, -60))
	end
end

the handler makes the values

function PlayerJoined(player)
	local Tool = Instance.new("StringValue",player)
	Tool.Name = "Tool"
	Tool.Value = "Hands"
	local GunAm = Instance.new("NumberValue",Tool)
	GunAm.Name = "Ammo"	
	local GunClip = Instance.new("NumberValue",Tool)
	GunClip.Name = "Clip"
	local Armor = Instance.new("NumberValue",player)
	Armor.Name = "Armor"
	Armor.Value = 0
	player:WaitForDataReady()
	local Money = player:LoadNumber("Money")
	local stats = Instance.new("IntValue", player)
	stats.Name = "leaderstats"
	local RankValue = Instance.new("StringValue", stats)
	RankValue.Name = "Rank"
	RankValue.Value = player:GetRoleInGroup(2532396) 
	local MoneyValue = Instance.new("IntValue", stats)
	MoneyValue.Name = "Money"
	MoneyValue.Value = Money
	
end

game.Players.ChildAdded:connect(PlayerJoined)

can anyone tell me what goes wrong? because roblox freezes when I try to join(the loading screen freezes)

Can't have a while true dowithout a delay. Otherwise you're doing millions of commands at once. You need to put wait(seconds) somewhere in that loop, or even put while wait() doinstead ofwhile true do(don't ask how that works).