Instantiates a Shape object that is the prototype Polygon translated
by the given (x, y) point and scaled by given (xScale, yScale) factor
times the internal scaleFactor.
No-parameter constructor that instantiates the AffineTransform used
internally and the following files with a 50% probability:
ballworld\model\paint\images\Sonic_animate.gif or
ballworld\model\paint\images\Mario_animate.gif with a fill factor of 0.5.