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examples:
koch snowflake
,
hilbert curve
,
spiral
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pd ifelse :size < 3 [forward :size] [ right 60 linel (:size / 2) left 60 liner (:size / 2) left 60 linel (:size / 2) right 60 ] end to linel :size ifelse :size < 3 [forward :size] [ left 60 liner (:size / 2) right 60 linel (:size / 2) right 60 liner (:size / 2) left 60 ] end clearscreen setxy 50 450 right 90 linel 400
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