"now make it so in the first animation the right arm does damage and in the second animation the left arm does damage, 10 damage"

-- server script 
local ReplicatedStorage = game:GetService("ReplicatedStorage")
local anim1 = ReplicatedStorage:FindFirstChild("right punch")
local anim2 = ReplicatedStorage:FindFirstChild("left punch")

-- local script 
local player = game.Players.LocalPlayer
local character = player.Character
local humanoid = character:FindFirstChild("Humanoid")
local animTrack1 = humanoid:LoadAnimation(anim1)
local animTrack2 = humanoid:LoadAnimation(anim2)

local punching = false
local punchCount = 0
local canPunch = true

local function punch()
	if canPunch then
		if punching then
			if animTrack2.IsPlaying then
				return
			end
			punching = false
			animTrack1:Stop()
			animTrack2:Play()
			-- make left arm do damage
			local leftArm = character:FindFirstChild("Left Arm")
			local function onTouched(part)
				local otherCharacter = part.Parent
				local otherHumanoid = otherCharacter:FindFirstChildWhichIsA("Humanoid")
				if otherHumanoid then
					otherHumanoid:TakeDamage(10)
				end
			end
			leftArm.Touched:Connect(onTouched)
		else
			if animTrack1.IsPlaying then
				return
			end
			punching = true
			animTrack2:Stop()
			animTrack1:Play()
			-- make right arm do damage
			local rightArm = character:FindFirstChild("Right Arm")
			local function onTouched(part)
				local otherCharacter = part.Parent
				local otherHumanoid = otherCharacter:FindFirstChildWhichIsA("Humanoid")
				if otherHumanoid then
					otherHumanoid:TakeDamage(10)
				end
			end
			rightArm.Touched:Connect(onTouched)
		end
		punchCount = punchCount + 1
		if punchCount >= 4 then
			canPunch = false
			wait(2)
			canPunch = true
			punchCount = 0
		end
	end
end

game:GetService("UserInputService").InputBegan:Connect(function(input)
	if input.KeyCode == Enum.KeyCode.E then
		if not animTrack1.IsPlaying and not animTrack2.IsPlaying then
			punch()
		end
	end
end)