Infinitely Moving SurfaceGui Background

[hybrid osprey]

Hey everyone!
I'm new to scripting, and I wanted to make some cool animation that uses this Pattern to scroll diagonally, while also being seamlessly infinite(The example gif is also attached). This whole thing is in the SurfaceGui. I went through a lot of Roblox Forums and Youtube videos. Yet i just notice that while being a newbie to scripting I ran into problem that no one really asks for and even might not be supported by Roblox. I tried using ScaleType Tile with RectOffset, but it worked really badly or just starts to stretch until automatically reset.

Here is "one" of the codes that performed the best (Origin Code from Roblox Forums/ChatGPT)

local img = script.Parent.Frame.ImageLabel
local offsetx = 0
local offsety = 0
local speed = 5
img.ImageRectSize = Vector2.new(1024, 1024)    
while true do
    offsetx = (offsetx + speed) % img.ImageRectSize.X
    offsety = (offsety + speed) % img.ImageRectSize.Y
    img.ImageRectOffset = Vector2.new(offsetx, offsety)
    task.wait(0.03)
end

[still heath]

I think it should be offsetx += ... and offsety += ...

because it doesn't seem that the speed/image si,e is increasing