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A few images produced by Ant-Card, in no particular order...

Ant ++-- "The Cardioid" or "The Apple"

cardioid formed by generalized Langton's ant ++--

^ Number of passages, logarithmic scale.

cardioid formed by generalized Langton's ant ++--

^ Number of passages, logarithmic scale (?); note the slight fluctuations in color in the dark red areas.

Ant ++-+-++++-+- "Lighthouse Ray"

lighthouse ray formed by a generalized Langton's ant

^ Rule ++-+-++++-+- after 2293367 steps; number of passages, linear scale (inversed). The ant escapes on the upper left, but instead of creating a thin highway, it creates and fills an angle. This effect was first noticed by Scott Robert Ladd for ant ++-+-++ (which he calls 1101011 (binary) or 107 (decimal)). To be exactly reproduced it needs an ant whose rule begins with ++-+-++++-+- (taking into account that rules are actually periodic so rule ++-+-++ is equivalent to ++-+-++++-+-++++-+-++++-+-++...)

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