To make objects appear when a light is turned on and off you need to move them from one room to another and back again

1. First make up a room that is exactly the same as the original room:

   

2. Next, put all the objects that were in the original room into the “new” one:

   

3. In the “old” room add in an object like a switch or sensor:

   

4. Click on Options on the switch/sensor and select Can be switched on/off:

   

5. Add a message when switched on and off:

   

6. Go to After switching on the object: and add in the commands:

   

7. This moves the objects from Office2 to Office when the light is switched on

8. Go to After switching off the object: and add in the commands:

   

9. This moves the objects back into Office2 to Office when the light is switched off.

10. Click on the Office Room and make up an IF script like this:

    

11. This writes a message when you go into a room if the switch is off or on:

    

12. When you play the game you see a touch pad that you can switch on and off:

    

13. When you press it on the objects are moved into the room:

    

14. When you switch off, the objects are “removed”: