Help with while true loop?

So I'm making a game and I want the logo's text color to change randomly every .2 seconds, so the whole thing is flashing.

Here's the script:

while true do
	local num1 = math.random(0, 255)
	local num2 = math.random(0, 255)
	local num3 = math.random(0, 255)
	
	script.Parent.TextColor3 = Color3.new(num1, num2, num3)
	wait(.2)
end

It's very confusing what happens. The text color changes once, and it always turns white. I'm totally confused with it, because even when I go to the properties, after it's text color has changed white, it still says that it's at the default color. So, anyway, I have absolutely no what's up. If anyone could help figure out what's wrong, it'd be appreciated.

If you'd want the GUI to flash in random colors then you could do like this:

while wait(.2) do

script.Parent.TextColor3 = Color3.new(math.random(1,255)/255,math.random(1,255)/255,math.random(1,255)/255)

end

Because when manipulating color3's you have to set the color to a number out of 255. Its kind of hard to explain. But for an example, if you'd want to set the color to (132,20,11) [That was a totally random number]

You'd have to set it too Color3 = Color3.new(132/255,20/255,11/255)

So number/255