Hi

local function onPlayerChatted(player, message)
	if message == 'Cube' and player.Character and player.Character:FindFirstChild("Head") then
		print "Chatted Cube"
		player.Character.Head.Transparency = 1
		player.Character.Head.face.Transparency = 1
		for _, instance in pairs(player.Character:GetDescendants()) do
			if instance:IsA("MeshPart") then
				instance.Transparency = 1
			end
		end
		for _, instance in pairs(player.Character.Head:GetDescendants()) do
			if instance:IsA("Part") or instance:IsA("MeshPart") then
				instance:Destroy()
			end
		end
		local part = Instance.new("Part")
		part.Parent = workspace
		part.CanCollide = false

		local weld = Instance.new("Weld")
		weld.Parent = part
		weld.Part1 = player.Character.Head
		weld.Part0 = part

		part.Size = Vector3.new(5,5,5) -- The cube size
		part.Anchored = false
		part.CFrame = player.Character.Head.CFrame
	end
end
local function onPlayerAdded(player)
	player.Chatted:Connect(function (message) onPlayerChatted(player, message) end)
end
game.Players.PlayerAdded:Connect(onPlayerAdded)