Finished making my animation, how do I loop my animation?

Hello, my recent question has been solved on how to script an animation so it plays when you sit down, however my animation stays for a while and then disappears. Does anyone have an animation loop script? Thanks.

Here's the script:

script.Parent.ChildAdded:Connect(function(c) -- when a child is added (assuming the parent is the seat)
    if c:IsA("Weld") and c.Name == "SeatWeld" then -- if the added child is a weld and is named "SeatWeld"
        if c.Part1.Parent:FindFirstChildOfClass("Humanoid") then -- if the script finds a humanoid
            local anim = Instance.new("Animation") -- makes the animation
            anim.AnimationId = "rbxassetid://2521211373"  -- sets the id of it
            local track = c.Part1.Parent:FindFirstChildOfClass("Humanoid"):LoadAnimation(anim) -- loads the animation
            Track.Loop = true
            track:Play() -- plays the animation
        end
    end
end)