Recipe for State.
1)write it out, figure out how the classes will interact, what your states will be, and what actions will create the transintions.
2) Create the interface with the State methods
3) follow this with the classes that represent the different states and implement the state interface, override methods where necessary
4) create the necesarry reference variables in the constructor of the subject of this pattern, the one whose state is going to be changing.
5)using these reference variables, you can now implement the given methods in your subject, but use the state reference variable to execute the methods, so that when it is executed, the output will be appropriate to whatever state the object is in.
6) I think this may have already been done somewhere along the way, but just in case, be sure you set up the code representing the actions that will create the shift changes. These will probably already be inside the overridden methods within your state interface implementers.
