How do you make a tile scrolling animation?

So I was trying to make a tile scrolling animation where a pattern would scroll down forever but it won't reset the animation so it would just fly off the screen. how do I fix this?

Scroll = script.Parent

while true do
    wait()
    Scroll.Position = Scroll.Position + UDim2.new(0, 0,0.1, 0)
    print (Scroll.Position)
    if Scroll.Position >= UDim2.new(0, 0,0, 0) then
        Scroll.Position = UDim2.new(0, 0,-1, 0)
        print("Animation reset")
    end
end