12.1 Custom Drawn Panels
12.2 java.awt.Graphics2D
    12.2.1 Shapes
    12.2.2 Settings
        12.2.2.1 Paint
        12.2.2.2 Stroke
        12.2.2.3 Font
        12.2.2.4 Clip
        12.2.2.5 Transform
    12.2.3 Affine Transforms
12.3 Images
    12.3.1 BufferedImage
    12.3.2 Reading and Writing Images
    12.3.3 Double Buffering
    12.3.4 Revisiting TexturePaint
12.4 Other Events
    12.4.1 Mouse Events
    12.4.2 Keyboard Events
12.5 Animation with Timer
12.6 Putting it Together