Why does this custom animation not stop when you move?

I'm trying to make a sleeping animation but you stay sleeping even when you move.

prefix = "/e "
game.Players.PlayerAdded:connect(function(p)
p.Chatted:connect(function(m)
m = m:lower()
if m == prefix.."sleep" then
local a = Instance.new("Animation",p.Character)
a.AnimationId = "rbxassetid://2053583627"
local h = p.Character:FindFirstChild'Humanoid'
local t = h:LoadAnimation(a)
t:Play()
workspace.Player.Humanoid.Running:connect(function(speed)
	 if speed > 0 then
		t:Stop()
	end
end)
end
end)
end)

Thanks if you can help

###You’re setting up an event that checks if it’s walking to stop the animation, this is just too much work. Simply set the walk speed to 0.

game:GetService("Players").PlayerAdded:Connect(function(plr)
    plr.Chatted:Connect(function(msg, recipient)
        if msg == "/e sleep" and not recipient then
            if not plr.Character:FindFirstChild"SleepAnim" then
                local animation = Instance.new"Animation"
                animation.AnimationId = "rbxassetid://2053583627"
                animation.Name = "SleepAnim"
                animation.Parent = plr.Character
            
                local animTrack = plr.Character.Humanoid:LoadAnimation(animation)
                animTrack:Play()
            
                while animTrack.IsPlaying do
                    plr.Character.Humanoid.WalkSpeed = 0 
                    wait()
                end
            end
        end

    end)
end)