How do I apply damage to my animations?

local Player = game.Players.LocalPlayer
local Character = Player.Character
local Humanoid = Character:WaitForChild("Humanoid")
local Mouse = Player:GetMouse()

local UserID = Player.userId

Player:WaitForChild('PlayerGui')
Player:WaitForChild('Backpack')

Character:WaitForChild('Head')
Character:WaitForChild('Torso')

--------------------------------------------
-- Set the IDs below. (Numbers only)
local AnimSlot1 		= "664485903" -- ~
local AnimSlot2			= "664052022" -- ~
local AnimSlot3			= "664853215" -- ~
local AnimSlot4			= "664949014" -- ~
local AnimSlot5			= "0" -- ~
local AnimSlot6 		= "0" -- ~
local AnimSlot7 		= "0" -- ~
local AnimSlot8			= "0" -- ~
local AnimSlot9			= "0" -- ~
local AnimSlot10		= "0" -- ~

--------------------------------------------
-- Keys to press to play animations (they're in the same order to play every animation for the slot you've set
local KeyPressSlot1		= "R"
local KeyPressSlot2		= "T"
local KeyPressSlot3		= "G"
local KeyPressSlot4		= "F"
local KeyPressSlot5		= ""
local KeyPressSlot6		= ""
local KeyPressSlot7		= ""
local KeyPressSlot8		= ""
local KeyPressSlot9		= ""
local KeyPressSlot10	= ""

--------------------------------------------


local AnimBlock1 		= true
local AnimBlock2 		= true
local AnimBlock3		= true 
local AnimBlock4 		= true
local AnimBlock5 		= true
local AnimBlock6 		= true
local AnimBlock7		= true
local AnimBlock8		= true
local AnimBlock9		= true
local AnimBlock10		= true

--------------------------------------------
-- Below; set the speed for every animation. leave as "DefaultSpeed" for the '16'. You can change it to like anything.

local AnimSpeed1		= 16
local AnimSpeed2		= 16
local AnimSpeed3		= 10
local AnimSpeed4		= 10
local AnimSpeed5		= 16
local AnimSpeed6		= 16
local AnimSpeed7		= 16
local AnimSpeed8		= 16
local AnimSpeed9		= 16
local AnimSpeed10		= 16

-------------------------------------------- Don't edit below.

local UrlCode = "http://www.roblox.com/Asset?ID="
local Animation = Instance.new("Animation")

local Track = nil
local CanPlay = true

--------------------------------------------

function setBackpackDisplay(show)
	game.StarterGui:SetCoreGuiEnabled(Enum.CoreGuiType.Backpack, show)
end

function setHealthDisplay(show)
	game.StarterGui:SetCoreGuiEnabled(Enum.CoreGuiType.Health, show)
end

function setPlayerListDisplay(show)
	game.StarterGui:SetCoreGuiEnabled(Enum.CoreGuiType.PlayerList, show)
end

function setChatDisplay(show)
	game.StarterGui:SetCoreGuiEnabled(Enum.CoreGuiType.Chat, show)
end

function setAllDisplay(show)
	game.StarterGui:SetCoreGuiEnabled(Enum.CoreGuiType.All, show)
end

--------------------------------------------

blockEquip = script.resources.blockEquipment

function loadAnimation(Id, PlayerSpeed, blockTools)
	if CanPlay == true then CanPlay = false
	Animation.AnimationId = (UrlCode..Id)
	Track = Humanoid:LoadAnimation(Animation)
	Track:Play()
	Humanoid.WalkSpeed = PlayerSpeed
	allowTools = blockTools print 'playing'
	if allowTools == true then
		setBackpackDisplay(false)
		blockEquip.Disabled = false
	end end
end

function UnloadAnimation()
	if CanPlay == false then
	blockEquip.Disabled = true
	setBackpackDisplay(true)
	Track:Stop()
	Humanoid.WalkSpeed = 16 print 'removing'
	CanPlay = true end
end

-------------------------------------------- 1

Mouse.KeyDown:connect(function(Key)
if (string.upper(Key) == KeyPressSlot1) and CanPlay == true then
	loadAnimation(AnimSlot1, AnimSpeed1, AnimBlock1)
	
elseif (string.upper(Key) == KeyPressSlot1) and CanPlay == false then
		UnloadAnimation()
	end
end)

-------------------------------------------- 2

Mouse.KeyDown:connect(function(Key)
if (string.upper(Key) == KeyPressSlot2) and CanPlay == true then
	loadAnimation(AnimSlot2, AnimSpeed2, AnimBlock2)
	
elseif (string.upper(Key) == KeyPressSlot2) and CanPlay == false then
		UnloadAnimation()
	end
end)

-------------------------------------------- 3

Mouse.KeyDown:connect(function(Key)
if (string.upper(Key) == KeyPressSlot3) and CanPlay == true then
	loadAnimation(AnimSlot3, AnimSpeed3, AnimBlock3)
	
elseif (string.upper(Key) == KeyPressSlot3) and CanPlay == false then
		UnloadAnimation()
	end
end)

-------------------------------------------- 4

Mouse.KeyDown:connect(function(Key)
if (string.upper(Key) == KeyPressSlot4) and CanPlay == true then
	loadAnimation(AnimSlot4, AnimSpeed4, AnimBlock4)
	
elseif (string.upper(Key) == KeyPressSlot4) and CanPlay == false then
		UnloadAnimation()
	end
end)

-------------------------------------------- 5

Mouse.KeyDown:connect(function(Key)
if (string.upper(Key) == KeyPressSlot5) and CanPlay == true then
	loadAnimation(AnimSlot5, AnimSpeed5, AnimBlock5)
	
elseif (string.upper(Key) == KeyPressSlot5) and CanPlay == false then
		UnloadAnimation()
	end
end)

-------------------------------------------- 6

Mouse.KeyDown:connect(function(Key)
if (string.upper(Key) == KeyPressSlot6) and CanPlay == true then
	loadAnimation(AnimSlot6, AnimSpeed6, AnimBlock6)
	
elseif (string.upper(Key) == KeyPressSlot6) and CanPlay == false then
		UnloadAnimation()
	end
end)

-------------------------------------------- 7

Mouse.KeyDown:connect(function(Key)
if (string.upper(Key) == KeyPressSlot7) and CanPlay == true then
	loadAnimation(AnimSlot7, AnimSpeed7, AnimBlock7)
	
elseif (string.upper(Key) == KeyPressSlot7) and CanPlay == false then
		UnloadAnimation()
	end
end)

-------------------------------------------- 8

Mouse.KeyDown:connect(function(Key)
if (string.upper(Key) == KeyPressSlot8) and CanPlay == true then
	loadAnimation(AnimSlot8, AnimSpeed8, AnimBlock8)
	
elseif (string.upper(Key) == KeyPressSlot8) and CanPlay == false then
		UnloadAnimation()
	end
end)

-------------------------------------------- 9

Mouse.KeyDown:connect(function(Key)
if (string.upper(Key) == KeyPressSlot9) and CanPlay == true then
	loadAnimation(AnimSlot9, AnimSpeed9, AnimBlock9)
	
elseif (string.upper(Key) == KeyPressSlot9) and CanPlay == false then
		UnloadAnimation()
	end
end)

-------------------------------------------- 10

Mouse.KeyDown:connect(function(Key)
if (string.upper(Key) == KeyPressSlot10) and CanPlay == true then
	loadAnimation(AnimSlot10, AnimSpeed10, AnimBlock10)
	
elseif (string.upper(Key) == KeyPressSlot10) and CanPlay == false then
		UnloadAnimation()
	end
end)

None of that is my work but that is what I used for my animations to work. I'm a boxing fan so I decided to make some punching animations but I'm unsure of how to apply damage to them. I want the animations to do damage to other players not NPCs. Yesterday was the first time I've ever even attempted to script so my scripting experience and terminology is poor. So I have 2 questions, 1. How do I apply damage to my new animations and 2. what do I do with the script when I'm done? To be clear, it's health damage I'm looking for.