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Objects constructed from localized structures in rule 110, used for the emulation of cyclic tag systems. Each of the pictures shown is 500 cells wide. The objects in the top two pictures correspond to the thick vertical black and gray lines in picture (d) on page 679. The objects in the next two pictures correspond to the dark and light gray lines that come in from the left in picture (d). (Note that all the structures are left-right reversed in rule 110.) The third pair of pictures correspond to two versions of the dashed lines in picture (d). And the fourth pair of pictures correspond to right-going lines on the right-hand side of picture (d). All the localized structures involved in the pictures above were shown individually on page 292. Note that the spacings between structures are crucial in determining the objects they represent.

From Stephen Wolfram: A New Kind of Science [citation]