Demo/turtle/tdemo_yinyang.py

   1 #!/usr/bin/python
   2 """       turtle-example-suite:
   3
   4             tdemo_yinyang.py
   5
   6 Another drawing suitable as a beginner's
   7 programming example.
   8
   9 The small circles are drawn by the circle
  10 command.
  11
  12 """
  13
  14 from turtle import *
  15
  16 def yin(radius, color1, color2):
  17     width(3)
  18     color("black")
  19     fill(True)
  20     circle(radius/2., 180)
  21     circle(radius, 180)
  22     left(180)
  23     circle(-radius/2., 180)
  24     color(color1)
  25     fill(True)
  26     color(color2)
  27     left(90)
  28     up()
  29     forward(radius*0.375)
  30     right(90)
  31     down()
  32     circle(radius*0.125)
  33     left(90)
  34     fill(False)
  35     up()
  36     backward(radius*0.375)
  37     down()
  38     left(90)
  39
  40 def main():
  41     reset()
  42     yin(200, "white", "black")
  43     yin(200, "black", "white")
  44     ht()
  45     return "Done!"
  46
  47 if __name__ == '__main__':
  48     main()
  49     mainloop()