Lab 09: Using APIs and developing projects with more complex types

Goals:
- Read documentation for and use an API
- Design solutions that involve more complex types
- Develop (analyze, design, code, test, document) more sophisticated programs

0. Do the exercises in section 5.12 of the textbook. The final result 
should be a demo of several multi-colored balls bouncing in a box.
The project must contain appropriate javadoc generated documentation and a
test suite.

1. Exercise 6.36: Find the errors in the bricks project.