How can you detect walkspeed for humanoid and then do a thing?

I was trying this for a couple of hours and I still coulden't fix this bug, Maybe someone knows how? Here's my script:

local Player = game.Players.LocalPlayer
local Character = workspace:WaitForChild(Player.Name)
local humanoid = Character:WaitForChild('Humanoid')

local run = workspace.Run2


humanoid:GetPropertyChangedSignal("WalkSpeed"):Connect(function()
   if humanoid.WalkSpeed == 0 then
	        run:Stop()
	    end
	end)

You can use the GetPropertyChangedSignal, which will fire an event each time the humanoid's walkspeed is changed.

EDIT: from what i can see, you're tried to access the humanoid incorrectly. since this is a localscript (i hope), you should be able to access the character's humanoid through player.Character.

local plr = game:GetService('Players').LocalPlayer
repeat wait() until plr and plr.Character and plr.Character:FindFirstChild('Humanoid')
local humanoid = plr.Character.Humanoid

local run = workspace.Run2

humanoid:GetPropertyChangedSignal('WalkSpeed'):Connect(function()
	if humanoid.WalkSpeed == 0 then
		run:Stop()
	end
end)