How can I make this loop repeat every 1 second?

Once I run through this script in test mode, there are no errors. The script still does not work though. What am I doing wrong?

local plr = game.Players.LocalPlayer
local g = plr:WaitForChild'stats'
local timemax = g:WaitForChild('timemax')
local countdown = g:WaitForChild('countdown')
local loaded = g:WaitForChild('loaded')

for i = 1,25 do
countdown.Value = countdown.Value +1
script.Parent.Size = UDim2.new(countdown.Value/timemax.Value,0,1,0)
wait(1)
end
if countdown.Value == 60 then
loaded.Value = true
end

The script is in a LocalScript and It is supposed to add 1 to the countdown value every 1 second, then when the countdown's value is 60, the "loaded" value is true. Which will complete the loading sequence in my game. Thank you for the help!

add wait(1) after for i = 1,25 do

for i = 1,25 do
wait(1)