This figure uses multicolored and numbered boxes to represent nodes. Nodes 1 are light blue, Nodes 2 and medium blue, and Node 3s are dark blue. The nodes appear in three rows-nodes 1 on top, nodes 2 in the middle, and nodes 3 on bottom-and either collide or successfully land in one of three types of slots. A key identifies the slots: C = Collision slot, E = Empty slot, and S = Successful slot. A dotted arrow points from left to right at the bottom of the figure, representing the passage of time. The figure itself appears like this: