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examples:
koch snowflake
,
hilbert curve
,
spiral
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home sety 100 setx 100 right 30 forward 200 right 120 forward 200 right 120 forward 200 penup backward 100 pendown right 120 forward 100 repeat 2 [left 120 forward 100] TO TRiANGLE :length REPEAT 3 [FW :length RT 120] END penup backward 50 pendown right 60 triangle 50 left 180 triangle 50 penup forward 50 pendown left 60 penup left 30 forward 50 pendown triangle 50 triangle 50
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