Applying State Pattern

I'm trying to apply State pattern on certain program. But can't find out what to do with this one..

Short Description :

There's security system that works like :

To get to the "treasure" you have to pull the lever inside a room, but the door leading to the room has to be closed. Then a Control System is opened.

You can insert a key and get to the treasure, but before you do that, you have to place lever to the original position otherwise you get trapped...

The code of Class I should apply State pattern to :

public class ControlSystem {

    private State state1, state2;
    private boolean st1, st2;

    public ControlSystem() {
        state1 = new Door(true);
        state2 = new Lever(false);
        st1 = true;
        st2 = false;
    }

    public void open() {
        state1 = new Door(true);
        state1.handle();
        st1 = true;
    }

    public void close() {
        state1 = new Door(false);
        state1.handle();
        st1 = false;
    }

    public void pull() {
        state2 = new Lever(true);
        state2.handle();
        st2 = true;
    }

    public void push() {
        state2 = new Lever(false);
        state2.handle();
        st2 = false;
    }

    public void info() {
        if (!st1 && st2) {
            System.out.println("Control System is opened");
            if (!st2) {
                System.out.println("You can take the treasure");
            } else {
                System.out.println("Oww... You get trapped");
            }
        }

    }

}

The handle() method just prints the actual state of certain thing.

I know that the condition in method info() is nonsense, but I let it be that way so I could get help from you guys how to edit it....