String Double Tap W

local Humanoid = game.Players.LocalPlayer.Character:WaitForChild("Humanoid")
local UIS = game:GetService('UserInputService')
local Run = Humanoid:LoadAnimation(script:WaitForChild("Run"))
local S,Word,Running = " ", "W",false

UIS.InputBegan:Connect(function(Input,IsTyping)
	if IsTyping then return end
	if Input.KeyCode == Enum.KeyCode[Word] then
		S = S..Word
	end

	delay(.3, function()
		if S ~= string.rep(Word,2) then S = "" end
	end)

	if S == tostring(Input.KeyCode):gsub("Enum.KeyCode.",Word) then
		Running = true
		Run:Play()
		Humanoid.WalkSpeed = 32
	end

	local ChangeEnd = UIS.InputEnded:Connect(function(Input)
		if Input.KeyCode == Enum.KeyCode[Word] then
			if S ~= Word then Running = false end
		end
	end)

	repeat wait() until Running == false
	ChangeEnd:Disconnect()
	Run:Stop()
	Humanoid.WalkSpeed = 16
end)