I want my gui size to change But it wont change when I run my script?

Im Trying to Have The gui Be a certain size when i press it and go down when i stop pressing but it wont change the size

local player = game.Players.LocalPlayer
local uis = game:GetService("UserInputService")

local gui = game.StarterGui:WaitForChild("ScreenGui")

uis.InputBegan:connect(function(input)
	if input.KeyCode == Enum.KeyCode.F then
		
gui.Frame = UDim2.new(10, 10, 10, 10)
			
			print("Down")
		
	end
end)

uis.InputEnded:Connect(function(input)
	if input.KeyCode == Enum.KeyCode.F then
		gui.Frame = UDim2.new(0, 0, 0, 0)

print("UP")
		
end
end)

UDim2 changes the position or size while you are trying to change an instance. Instead of:

gui.Frame = UDim2.new(10, 10, 10, 10)

do:

gui.Frame.Size = UDim2.new(10, 10, 10, 10)