Frame size not updating?

I have this local script inside of a frame that is just supposed to change the size of the frame. But the size isn't updating to the value I want it to when I test it out. When I run the command:

game.Players.jediplocoon.PlayerGui.Level.XPBar.Size = UDim2.new(0, 200, 0, 30)

in the output/console it works just fine, but it doesn't work for some reason in my script, here it is:

local barsize = script.Parent.Size
while true do
	barsize  = UDim2.new(0, 200, 0, 30)
	print(barsize) --prints {0, 200},{0, 30}
	wait(1)	
end

Note-This is in a local script in a frame, which I'm trying to change the size of. If anybody could tell me what I did wrong, and point me in the right direction that would be greatly appreciated.