ManaRun Local Script[2021]

repeat wait() until game.Players.LocalPlayer.Character

local Character = game.Players.LocalPlayer.Character
local Humanoid = Character:WaitForChild("Humanoid")
local UIS = game:GetService('UserInputService')
local LastTapped,Tapped = false,false
local Run = Humanoid:LoadAnimation(script:WaitForChild("Run"))
local Mana,Trash = game.Players.LocalPlayer:WaitForChild("DataFolder").Mana, {}
local TrailPart = game.ReplicatedStorage:WaitForChild("Effects").TrailPart
local NotRun,Normal,ManaRun = 16,24,36

local function CheckMana(Pass)
	if Pass then
		if Mana.Value == 0 then return end
		if Trash[Character] then return end
		if not LastTapped and not Tapped then return end
		local NewTrail = TrailPart:Clone(); NewTrail.Parent = workspace
		Trash[Character] = NewTrail
		Trash[Character].RunTrail.Enabled = true
		local WC = Instance.new("WeldConstraint",Trash[Character])
		WC.Part0 = Trash[Character]; WC.Part1 = Character.HumanoidRootPart
		Trash[Character].Position = Character.HumanoidRootPart.Position
		Humanoid.WalkSpeed = ManaRun
	else
		for _,v in pairs(Trash) do
			v:Destroy()
		end
		Trash[Character] = nil
	end
end

Mana.Changed:Connect(function()
	if Mana.Value == 0 then
		for _,v in pairs(Trash) do
			v:Destroy()
		end
		Trash[Character] = nil
		if LastTapped then Humanoid.WalkSpeed = Normal else Humanoid.WalkSpeed = NotRun end
	end
end)

UIS.InputBegan:Connect(function(Input, IsTyping)
	if IsTyping then return end
	if Input.KeyCode == Enum.KeyCode.W then
		if Tapped == false then
			Tapped = true
		else
			LastTapped = true
			Tapped = false
			Run:Play()
			Humanoid.WalkSpeed = Normal
			CheckMana(true)
		end

		delay(.4, function()
			if Tapped then
				Tapped = false
			end
		end)

	end
end)

UIS.InputEnded:Connect(function(Input, IsTyping)
	if IsTyping then return end
	if Input.KeyCode == Enum.KeyCode.W and LastTapped and not Tapped then
		Humanoid.WalkSpeed = NotRun
		CheckMana(false)
		Run:Stop()
	end
end)