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examples:
koch snowflake
,
hilbert curve
,
spiral
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to farn :laenge ifelse (:laenge< 1.3) [stop] Forward :laenge/7 RIGHT 55 farn :laenge*0.3 LEFT 52 Forward :laenge/7 LEFT 55 farn :laenge*0.3 RIGHT 58 farn :laenge*0.7 LEFT 3 BACK :laenge/7 LEFT 3 BACK :laenge/7 end clearscreen setxy 300 500 farn 450
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