Figure 11:

The order of prediction positions within the context window using iterative imputations. The order is alternating between the start (i.e. upper left) and the end (i.e. lower right). The direction from the start is from top to bottom and from left to right, while the direction from the end is from bottom to top and from right to left. The plot on the right gives an example. The number means the order of computation and the same color means the same relative position from the start and from the end.