[Solved] How do I make the animation not play when standing still?

I made a Run Animation script and a animation for it. The script works exactly how I want it except the script plays while the player isn't move. I don't want it too run while the player isn't moving. Is there a way I can do this?

local UIS = game:GetService("UserInputService")
local player = game.Players.LocalPlayer
local Character = player.Character or player.CharacterAdded:Wait()
local sprinting
local humanoid = player.Character:WaitForChild("Humanoid")
local animationTrack = humanoid:LoadAnimation(game.StarterPlayer.StarterPlayerScripts.LocalScript.Animation)
	
UIS.InputBegan:Connect(function(input, procccesed, isTyping)
	if not procccesed then
		if isTyping then
			return 
		end
		if input.KeyCode == Enum.KeyCode.LeftShift then
			sprinting = not sprinting
			if sprinting then
				player.Character.Humanoid.WalkSpeed = 30
				animationTrack:Play()
			else 
				player.Character.Humanoid.WalkSpeed = 16
				animationTrack:Stop()
			end
		end
	end
end)

if the humanoid state type changes to idle then it stops. (It's a humanoid property by the way)