How to make a part that does constant damage?

Hi, I'm new to scripting and I need help. I recently made a part which I inserted a script to make it deals damage every 1 second when a player touches it. The script is like this:

local debounce = false

script.Parent.Touched:Connect(function(hit)
    if hit.Parent:FindFirstChild("Humanoid") and debounce == false then
        debounce = true
        hit.Parent.Humanoid:TakeDamage(2)
        wait(1)
        debounce = false
    end
end)

The problem is that it only deals damage when the player is moving on the part, but when the player stand still and doesn't move, it stops taking any damage. How do I make it so that it still takes damage even if the player doesn't move?