OT - Kind of

[Lemmy]

classes are at the base of object oriented design.
every object in the program is a member of a class. Classes are made of attributes and methods. For example a class Ship could have attributes :
size
movement points
and a method:
move

then every ship in the program must have a size and a number movement points.

Before you start designing maybe you should first read a bit about OO design, it's really usefull to break a program down to little understandable bits of information.