[Solved] SOLVED:part2 is designed to graphically represent the behavior of the bird.

The program of part2 is designed to graphically represent the behavior of the bird. We have the four different types of birds in different color. A red color bird will move its position upward on the y-axis. A magenta color bird is moving randomly in the range of (0,0) to (19,19). A blue color bird will move zigzag through out the x-axis. When they hit the edge, they turn around and move again. A black color bird will move counter-clockwise circle. With the client program of Aviary, we set up the the program with interfaces and abstract classes. I made the AbstractBird abstract because some of the methods of my interfaces are the same for all birds. I put some fields into AbstractBird such as colors and positions are common to all birds