Took more than five minutes, yes.
*edit* I hacked my paint app I've named 'JOOPaint' sufficiently that I can now haz colors.
- adjust image size/create new image - currently, when you start, it creates a 320x240 image.
- Scrollbars. It zooms to upper-left and that's it...
- Also viewport
- Flood fill, also adjusting lineweight. Current 1px gets tiresome really fast....