C++ polymorphism-abstract classes

1.  Convert  the program using two classes.  One class must be an abstract class and the other is a derived class.  Be creative.  If you understand "polymorphism" and what an abstract class can and cannot do, you can solve this problem.     2.  The two classes must be declared in one file, and their implementation files must be in separate files.   The main( ) must be in a separate file. 3. There must be two member functions in the derived class.  One function, Play1( ) does the animation just like the original program does.  The second function, Play2 ( ) does an animation in which it swings sideways back and forth like a pendulum.     Feel free to add other functions  and constructors as needed.