Flex Tiling Image Class

So I needed a class that could be given a source image and would tile that source seamlessly as it is resized, but could also have the tiling offsets edited. I couldn't find any useful posts online about this, which could speak to my poor internetting skillz. (i don't think the "z" in skillz is merited when you suck at it...) So I built one and thought I'd share it in case any of you need one.