I need the player to move backwards from the way there facing?

I need the player to move backwards from the way there facing? But this script doesn't work, any fix's?

[Short] Local Script:

	for i = 1,14 do
		wait(0.01)
		local x = game.Workspace[Player.Name].HumanoidRootPart.Position.X
		local y = game.Workspace[Player.Name].HumanoidRootPart.Position.Y
		local z = game.Workspace[Player.Name].HumanoidRootPart.Position.Z
		wait(0.01)
		game.Workspace[Player.Name].HumanoidRootPart.CFrame = CFrame.new(Vector3.new(x,y,z +0.5))
	end

[Full] Local Script:

wait(3)
--Varibles
local InputService = game:GetService("UserInputService")
local timestamp = tick()
local doubleClickKey = Enum.KeyCode.S
local Player = game.Players.LocalPlayer
local Character = Player.Character
local Humanoid = Character:WaitForChild("Humanoid")

--Function
local function doublePress()
	--Walkspeed
	game.Workspace[Player.Name].Humanoid.WalkSpeed = 0
	wait(0.01)
	--Animation
    local Animation = Instance.new("Animation") -- create a new animation object
	Animation.AnimationId = "rbxassetid://2554941606"
	local Track = Humanoid:LoadAnimation(Animation)
	Track:Play()
	--MovePlayer
	for i = 1,14 do
		wait(0.01)
		local x = game.Workspace[Player.Name].HumanoidRootPart.Position.X
		local y = game.Workspace[Player.Name].HumanoidRootPart.Position.Y
		local z = game.Workspace[Player.Name].HumanoidRootPart.Position.Z
		wait(0.01)
		game.Workspace[Player.Name].HumanoidRootPart.CFrame = CFrame.new(Vector3.new(x,y,z +0.5))
	end
	Track:Play()
	for i = 1,14 do
		wait(0.01)
		local x = game.Workspace[Player.Name].HumanoidRootPart.Position.X
		local y = game.Workspace[Player.Name].HumanoidRootPart.Position.Y
		local z = game.Workspace[Player.Name].HumanoidRootPart.Position.Z
		wait(0.01)
		game.Workspace[Player.Name].HumanoidRootPart.CFrame = CFrame.new(Vector3.new(x,y,z +0.5))
	end
	game.Workspace[Player.Name].Humanoid.WalkSpeed = 16
end

--Function2
InputService.InputBegan:Connect(function(input, processed)
    if input.KeyCode == doubleClickKey and not processed then
        -- Same logic
        if tick() - timestamp <= 0.2 then
            doublePress()
        else
            timestamp = tick()
        end
    end
end)