Soooo... I'd been a liiiitle bit too passionate and made this.
Here I introduce you -
* P A I N T *

There's
github repo to see source code, btw.
Yes, it's 32x32 paint. Image is pretty self-explanatory.
But what's special about it? It has 5 patterns (including trivial white), and save/load system.

I also made my own key input box (to replace Keyboard.readLine) - if you need some kind of fancy input box to use inside your program, feel free to use it.

More information about classes (I made 5 of them) and source code is available at github.
===UPDATE===
Some basic compression for save string is implemented.
(gosh distinguishing 0 and o is very difficult in default implementation)