Why does this script not work after i wait a little after the 2nd animation plays?

If i keep pressing E, then it work's perfectly. But if i press E twice and wait a little, it won't play the other animation, or just prints('2'), and nothing after. Any ideas on why this is happening?

wait(game.Lighting.TimeToLoad.Value)

local UIS = game:GetService("UserInputService")
chain = 0

--//Combat Animation
local combat1 = Instance.new("Animation")
combat1.AnimationId = "http://www.roblox.com/Asset?ID=1093151226"
--
local combat2 = Instance.new("Animation")
combat2.AnimationId = "http://www.roblox.com/Asset?ID=1093152736"
--
local combat3 = Instance.new("Animation")
combat3.AnimationId = "http://www.roblox.com/Asset?ID=1093155314"
--
local combat4 = Instance.new("Animation")
combat4.AnimationId = "http://www.roblox.com/Asset?ID=1093156822"
--
local combat5 = Instance.new("Animation")
combat5.AnimationId = "http://www.roblox.com/Asset?ID=1093157747"
--
local combat6 = Instance.new("Animation")
combat6.AnimationId = "http://www.roblox.com/Asset?ID=1093158550"

UIS.InputBegan:Connect(function(Input, gameProcessedEvent)
	local KeyCode = Input.KeyCode
	if gameProcessedEvent == false then
		
	if KeyCode == Enum.KeyCode.E and chain == 0 then
		chain = 1
		print('1')
		local animTrack = game.Players.LocalPlayer.Character.Humanoid:LoadAnimation(combat1)
animTrack:Play()
workspace.CurrentCamera.Sounds.P1:Play()
wait(.5)
chain = 2
	else
	if KeyCode == Enum.KeyCode.E and chain == 2 then
		chain = 3
		print('2')
		local animTrack2 = game.Players.LocalPlayer.Character.Humanoid:LoadAnimation(combat2)
animTrack2:Play()
workspace.CurrentCamera.Sounds.P1:Play()
wait(.5)
chain = 4
	else
	if KeyCode == Enum.KeyCode.E and chain == 3 then
		chain = 4
		print('3')
		local animTrack3 = game.Players.LocalPlayer.Character.Humanoid:LoadAnimation(combat3)
animTrack3:Play()
workspace.CurrentCamera.Sounds.P1:Play()
wait(.5)
chain = 5
	else
	if KeyCode == Enum.KeyCode.E and chain == 5 then
		chain = 6
		print('4')
		local animTrack4 = game.Players.LocalPlayer.Character.Humanoid:LoadAnimation(combat4)
animTrack4:Play()
workspace.CurrentCamera.Sounds.P1:Play()
wait(.5)
chain = 7
	else
	if KeyCode == Enum.KeyCode.E and chain == 7 then
		chain = 8
		print('5')
		local animTrack5 = game.Players.LocalPlayer.Character.Humanoid:LoadAnimation(combat5)
animTrack5:Play()
workspace.CurrentCamera.Sounds.P1:Play()
wait(.5)
chain = 9
	else
	if KeyCode == Enum.KeyCode.E and chain == 9 then
		chain = 10
		print('6')
		local animTrack6 = game.Players.LocalPlayer.Character.Humanoid:LoadAnimation(combat6)
animTrack6:Play()
workspace.CurrentCamera.Sounds.P1:Play()
wait(.5)
chain = 0
		print('reset')
	end
	end
	end
	end
	end
	end
	end
end)