How do you stop a walking animation when the player stops walking?

I have tried for several months to make a successful walking animation. I have found out how to start the animation, but I don't know how to stop it when the player stopped walking.

--walking animation

--Variables

local UIS = game:GetService("UserInputService")
local player = game.Players.LocalPlayer
local char = player.character

--Main

UIS.InputBegan:connect(function(inputObject)
    if inputObject.KeyCode == Enum.KeyCode then
       local animation = Instance.new("Animation")
       animation.AnimationId = "https://www.roblox.com/asset?Id=1238381932"
       local PlayAnim = char.Humanoid:LoadAnimation(animation)
       PlayAnim:Play()
    end
end)

then I used this to try and stop it.

player.Character.Humanoid.Running:connect(function(speed)
	local animation = Instance.new("Animation")
	animation.AnimationId = "https://www.roblox.com/asset?Id=1238381932"
	local player = game.Players.LocalPlayer
	local char = player.character
	PlayAnim = char.Humanoid:LoadAnimation(animation)
     if speed == 0 then
         PlayAnim:Stop()
     end
 end)

but, it does not work. I have tried before but failed. Can some one help me?

Roblox likes to be stupid when it comes to walking animations. Try this script below. If It doesn't work, try changing '0' at line 7 to '1'. If it still doesn't work, let me know and we can try something else.

player.Character.Humanoid.Running:connect(function(speed)
	local animation = Instance.new("Animation")
	animation.AnimationId = "https://www.roblox.com/asset?Id=1238381932"
	local player = game.Players.LocalPlayer
    	local char = player.character
    	PlayAnim = char.Humanoid:LoadAnimation(animation)
	if speed > 0 then
		PlayAnim:Play()
	else
		PlayAnim:Stop()
	end
 end)