Here's what you do. Name an object that you want to bring through the glass door. I will post telling you if that item can be brought through the Green Glass Door. Now there is a particular rule for what you can bring through. For example the object must ryhme with the word Train. This rule can be much more complex and I will occasionaly change it. When I do I will give away the old rule.
By the way the first rule is not the example. Let the guessing begin!
Note: You can be as random as you want.