I have a script that changed the value of a variable every second, but why isn't it changing?

I couldn't fit the entire question in the title, so here's the full question:

I have a script that every few seconds it changed a variable (IntValue) and the value of that variable is shown on a TextLabel, and whenever the variable changes, it updates the text in said TextLabel. But the TextLabel isn't changing.. why?

Okay, that's my question. Here's my code:

local pointsToEarn = script.Parent.PointsToGive
local waitTime = script.Parent.PointsPerSecond
local pointsVar = script.Parent.Points

while true do
    wait(waitTime.Value) --Default: 2 second
    pointsVar.Value = pointsVar.Value + pointsToEarn.Value
    pointsVar.Changed:Connect(function()
        script.Parent.Text = pointsVar.Value
        if pointsVar.Value <= -1 then
            pointsVar.Value = 0
            error("Anonymous script/code line attempted to reach negative points. Find bug ASAP")
        end 
    end)
end

(P.S. This script used to work, but now it suddenly doesn't)

Variable values that were set by default:

pointsToEarn Value: 0 (but it changes to 15 later on in another script irrelevant to this question)

waitTime Value: 2 (it waits 2 seconds for the points value below for it to change)

pointsVar Value: 2000 (this is the points value)

The text in the TextLabel is similar to pointsVar. And the text changes whenever pointsVar value changes. Or, that's what I wanted it to do.

If you need any more information, please do not hesitate to ask for it. Thank you!