I need to put a wait () but I'm not sure where, could someone possibly help?

Ive got a script, and I believe everything is okay with it, the thing is. I've been told I need a wait time before triggering the flashtime but like I dont understand.

local Frame = script.Parent
local gui = script.Parent.Parent
function flashfunc()
local i = 1
repeat
    flashtimes()
    flashtimes()
    flashtimes()
    flashtimes()
    flashtimes()
until i == 1

gui.Enabled = false
end

function flashtimes()
    Frame.BackgroundColor3 = Color3.fromRGB(255,255,255)
    wait(0.1)
    Frame.BackgroundColor3 = Color3.fromRGB(0,0,0)
    wait(0.1)
end

You need to put waits into the repeat loop, put wait after every flashtimes(). If you want this infinite loop, use bigger waits like wait(0.5), or a second, because that will lag the server.

Oh crap. I forgot the main part of the script when I was helping you!

local Frame = script.Parent
local gui = script.Parent.Parent
function flashfunc()
local i = 5--//1 = 1 Second or 5 = 5 Seconds
repeat
    flashtimes()
    flashtimes()
    flashtimes()
    flashtimes()
    flashtimes()
i = i - 1 --//now the countdown will work properly
until i == 0

gui.Enabled = false
end

function flashtimes()
    Frame.BackgroundColor3 = Color3.fromRGB(255,255,255)
    wait(0.1)
    Frame.BackgroundColor3 = Color3.fromRGB(0,0,0)
    wait(0.1)
end

Now the script will flash for as long as you set i.