# Creating and Playing Juggler Objects

This chapter describes the object-oriented programming environment of the Juggler, which is a component of the Music library. The chapter describes the default Juggler object classes (sequence and collection), how to create sequences and collections, and the process used to play a sequence or a collection.

This chapter contains the following topics:

- Object-Oriented Programming Concepts
- Managing Juggler Objects
- Default Juggler Classes
- Creating Sequences and Collections
- Sending Messages to Sequences and Collections
- Playing Sequences and Collections
- An Example Program
- Function Calls and Method Macros
- Object-Defining Tag Arguments