TO A :XREPEAT 4[FD :X RT 90]ENDTO B :X :YREPEAT 2 [FD :X RT 45 FD :Y RT 135]ENDTO C :XA :X FD :X RT 45 B :X/3*2 :X RT 45 FD :X RT 90 FD :X RT 180B :X :X/3*2END执行:C 50zhongtujiaxuxian