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examples:
koch snowflake
,
hilbert curve
,
spiral
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; from Mindstorms pp. 69-74 to spi :distance :angle if :distance > 280 [stop] ;stop rule added forward :distance right :angle spi (:distance + 5) :angle end to spiral :angle cs spi 30 :angle end ; change the angle and click the run button spiral 70
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