Roblox: Function not looping or adding to the "money" value

I was programming a Roblox game, and I need a timer that loops, and it must add to the money IntValue. I play tested the code, but it did not loop or add to the money value. How would I solve this problem? There aren’t any errors occurring.
Here’s the code for the timer script. It is in a local script.

local minutes = 0
local seconds = 15

local player = game.Players.LocalPlayer
local leaderstats = player:FindFirstChild("leaderstats")
local money = leaderstats:FindFirstChild("Effect Coins")

while true do
    for i = 1, 15 do
        wait(1)
        if seconds == 0 then
            minutes = minutes - 1
            secconds = 59
        else
            seconds = seconds - 1
        end
        
        if seconds < 10 then
            script.Parent.Text = tostring(minutes)..":0"..tostring(seconds)
        else
            script.Parent.Text = tostring(minutes)..":"..tostring(seconds)
        end
    end
    
    money += 1
    minutes = 0
    seconds = 15
    
end

I tried changing the value of the time lengths, but it doesn’t seem to work.

>Solution :

From the snippet you have provided, it seems like your code does not even run properly since there are errors like:

Typos in variable:

secconds = 59

Lua does not have operator +=. Instead use:

seconds = seconds + 1

There might be another problem. When you search for money.

leaderstats:FindFirstChild("Effect

It returns reference to object. When you want to change the object you have to access its property or method.

I have never programmed anything in roblox, but i have found in documentation reference to text label. It contains property named "ContentText", what means you can change money by doing this: money.ContentText = "money value"

Link to documentation