I was wondering how the past tense could be represented and how it becomes the future. So in a two-dimensional plane we have the future on the right side, the right always represents the future as on a timeline. I wanted to make a portal to change from past to future. But it seems like a better idea to just run as time does. I was talking about this with my husband and we already had a good idea but in the end I did the representation first. We had made some airplanes on each side because we love aviation but we changed many things for the final result.