A collision between structures (l) and (i) from page 292. It takes more than 4000 steps for the final outcome involving 8 separate structures to become clear. The height of the picture corresponds to 2000 steps, and the third picture ends at step 4300.
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![](/nks/pages/p296--structures-in-class-4-systems/image-large.png)
![](/nks/pages/p296--structures-in-class-4-systems/image-medium.png)
![](/nks/pages/p296--structures-in-class-4-systems/image-small.png)