In each picture you can draw time axes. Mostly they start from the vanishing point, but sometimes they are different.
If you view it as a clock, where the above picture is number 12, the other pictures are 1,2, 3, 4, and so on… We will use this as a shorter description of the pictures.
At first: These arrows are vectors as well.
In 12:00 the time axis is a circle; It should demonstrate a paradox. And if you look closely at the picture you will see that the isle is an impossible object itself.
In 5:00 the time axis starts where the ghost starts. It is because this picture is about a chemical reaction and starts in the hands of the ghost. Above the ghost the molecules the ghost holds fusioned to another molecule.
In 6:00 the time axis starts where He – Helium is. You have to know that hydrogen and helium were the very first elements that were existent in the universe. Also, stars convert hydrogen to helium. In course of time heavier elements arise, mostly through the death of stars. That’s why the time axis starts at a light element and ends where I drew a molecule.
In 8:00 the time axis starts where the four tunnels cross, that’s a symbol that life starts where different atoms meet (The tunnels end in atoms).
In 9:00 the time axis is “broken”, it is because of the whole symbolism of this picture which is about time and death.
In 10:00 the time axis is vertical. It’s because of the cell division symbol I used there.
In the picture in the middle there is another closed loop. It looks like a string in string theory by the way. It is a symbol for paradoxes like the circle in the picture at 12:00; it’s just more complex in this case. Also, it combines all the different time axes of the 12 pictures around it in itself. (If you “count” the vectors together they will form the object in the picture in the midde.)