"Walking sound script" that I made shows no error on output but It is not working?

I was motivated by the original Sound script on Roblox and tried to make a script that plays the sound I want when you are walking on Material. And I think I messed up so bad. The script is not working and output says nothing. Please help me to fix this script.

(Original Script from Roblox) WARNING! This script is VERY long.

--[[
	Author: @spotco
	This script creates sounds which are placed under the character head.
	These sounds are used by the "LocalSound" script.

	To modify this script, copy it to your "StarterPlayer/StarterCharacterScripts" folder keeping the same script name ("Sound").
	The default Sound script loaded for every character will then be replaced with your copy of the script.
]]--
local ReplicatedStorage = game:GetService("ReplicatedStorage")
local Players = game:GetService("Players")

local SOUND_EVENT_FOLDER_NAME = "DefaultSoundEvents"
local DEFAULT_SERVER_SOUND_EVENT_NAME = "DefaultServerSoundEvent"

local SoundEventFolder = ReplicatedStorage:FindFirstChild(SOUND_EVENT_FOLDER_NAME)
local DefaultServerSoundEvent = nil

local useSoundDispatcher = UserSettings():IsUserFeatureEnabled("UserUseSoundDispatcher")
if useSoundDispatcher then
	if not SoundEventFolder then
		SoundEventFolder = Instance.new("Folder")
		SoundEventFolder.Name = SOUND_EVENT_FOLDER_NAME
		SoundEventFolder.Archivable = false
		SoundEventFolder.Parent = ReplicatedStorage
	end

	DefaultServerSoundEvent = SoundEventFolder:FindFirstChild(DEFAULT_SERVER_SOUND_EVENT_NAME)
else
	DefaultServerSoundEvent = ReplicatedStorage:FindFirstChild(DEFAULT_SERVER_SOUND_EVENT_NAME)
end

if not DefaultServerSoundEvent then
	if useSoundDispatcher then
		DefaultServerSoundEvent = Instance.new("RemoteEvent", SoundEventFolder)
	else
		DefaultServerSoundEvent = Instance.new("RemoteEvent", ReplicatedStorage)
	end

	DefaultServerSoundEvent.Name = DEFAULT_SERVER_SOUND_EVENT_NAME
	DefaultServerSoundEvent.OnServerEvent:Connect(function() end)
end

local function CreateNewSound(name, id, looped, pitch, parent)
	local sound = Instance.new("Sound")
	sound.SoundId = id
	sound.Name = name
	sound.archivable = false
	sound.Pitch = pitch
	sound.Looped = looped
	sound.MinDistance = 5
	sound.MaxDistance = 150
	sound.Volume = 0.65
	sound.Parent = parent

	if DefaultServerSoundEvent then
		local CharacterSoundEvent = Instance.new("RemoteEvent", sound)
		CharacterSoundEvent.Name = "CharacterSoundEvent"
		CharacterSoundEvent.OnServerEvent:Connect(function(player, playing, resetPosition)
			if type(playing) ~= "boolean" then
				return
			end
			if type(resetPosition) ~= "boolean" then
				return
			end

			if player.Character ~= script.Parent then
				return
			end
			for _, p in pairs(Players:GetPlayers()) do
				if p ~= player then
					-- Connect to the dispatcher to check if the player has loaded.
					if useSoundDispatcher then
						SoundEventFolder:FindFirstChild("SoundDispatcher"):Fire(p, sound, playing, resetPosition)
					else
						DefaultServerSoundEvent:FireClient(p, sound, playing, resetPosition)
					end
				end
			end
		end)
	end
	return sound
end

local head = script.Parent:FindFirstChild("Head")
if not head then
	error("Sound script parent has no child Head.")
	return
end

CreateNewSound("GettingUp", "rbxasset://sounds/action_get_up.mp3", false, 1, head)
CreateNewSound("Died", "rbxasset://sounds/uuhhh.mp3", false, 1, head) 
CreateNewSound("FreeFalling", "rbxasset://sounds/action_falling.mp3", true, 1, head)
CreateNewSound("Jumping", "rbxasset://sounds/action_jump.mp3", false, 1, head)
CreateNewSound("Landing", "rbxasset://sounds/action_jump_land.mp3", false, 1, head)
CreateNewSound("Splash", "rbxasset://sounds/impact_water.mp3", false, 1, head)
CreateNewSound("Running", "rbxasset://sounds/action_footsteps_plastic.mp3", true, 1.85, head)
CreateNewSound("Swimming", "rbxasset://sounds/action_swim.mp3", true, 1.6, head)
CreateNewSound("Climbing", "rbxasset://sounds/action_footsteps_plastic.mp3", true, 1, head)

(The Script I made)

local Char = script.Parent
local humanoid = Char:WaitForChild("Humanoid")
local Debris = game:GetService("Debris")
local Debounce = true

local LeftFoot = Char:WaitForChild('LeftFoot')
local RightFoot = Char:WaitForChild('RightFoot')

LeftFoot.Touched:Connect(function(Step)
local function SoundEdit(name, id, looped, playbackspeed, volume)
		local Sound = Instance.new("Sound")
		Sound.SoundId = id
		Sound.Name = name
		Sound.archivable = false
		Sound.PlaybackSpeed = playbackspeed
		Sound.Looped = looped
		Sound.MinDistance = 5
		Sound.MaxDistance = 150
		Sound.Volume = volume
		Sound.Parent = LeftFoot

if Debounce == true then
	
if humanoid.FloorMaterial.Name == "Cobblestone" then
Debounce = false
SoundEdit("Cobblestone", 'rbxassetid://379398649', false, 1, 1)
Sound:Play()
print("heya")
Debris:AddItem(Sound,.3)
end

if humanoid.FloorMaterial.Name == "Grass" then
Debounce = false
SoundEdit("Grass", 'rbxassetid://379398649', false, 1, 1)
LeftFoot:WaitForChild("Grass")
Sound:Play()
print("heya")
Debris:AddItem(Sound,.3)
end

end
end
end)