In
the first two programs, the turtles draw patterns with their
pens (in classic Logo style). In the other programs, the turtles
themselves form the patterns.
In
all of these programs, the turtles simply draw circles. Nothing
more. Interesting patterns are created by starting the turtles
with interesting initial conditions and by having some turtles
"hatch" other turtles. But when the turtles move, they simply
draw circles, nothing more.
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