This is an optical illusion known as the Impossible Doorway. At first, it seems impossible because there is a straight beam horizontally connecting two vertical beams in different places! But when you flip it around, you see that you were tricked! I built this because there were no other active Impossible Doorway projects on LEGO IDEAS, and I wanted to make one. I believe this would make a great LEGO product because LEGO has never made any optical illusions before, and this could be a good way of branching out. Feedback is greatly appreciated, so please, feel free to leave CONSTRUCTIVE criticism in the comments section. Thank You!