补充实例：      

1. import turtle

2. def main():

3. turtle.pensize(3)

4. turtle.penup()

5. turtle.goto(-200,-50)

6. turtle.pendown()

7. turtle.begin_fill()

8. turtle.color("red")

9. turtle.circle(40, steps=3)

10. turtle.end_fill()

11. turtle.penup()

12. turtle.goto(-100,-50)

13. turtle.pendown()

14. turtle.begin_fill()

15. turtle.color("blue")

16. turtle.circle(40, steps=4)

17. turtle.end_fill()

18. turtle.penup()

19. turtle.goto(0,-50)

20. turtle.pendown()

21. turtle.begin_fill()

22. turtle.color("green")

23. turtle.circle(40, steps=5)

24. turtle.end_fill()

25. turtle.penup()

26. turtle.goto(100,-50)

27. turtle.pendown()

28. turtle.begin_fill()

29. turtle.color("yellow")

30. turtle.circle(40, steps=6)

31. turtle.end_fill()

32. turtle.penup()

33. turtle.goto(200,-50)

34. turtle.pendown()

35. turtle.begin_fill()

36. turtle.color("purple")

37. turtle.circle(40)

38. turtle.end_fill()

39. turtle.color("green")

40. turtle.penup()

41. turtle.goto(-100,50)

42. turtle.pendown()

43. turtle.write(("Cool Colorful shapes"),

44. font = ("Times", 18, "bold"))

45. turtle.hideturtle()

46. turtle.done

47. if __name__ == '__main__':

48. main()