jpayne@69: #!/usr/bin/env python3
jpayne@69: """       turtle-example-suite:
jpayne@69: 
jpayne@69:             tdemo_yinyang.py
jpayne@69: 
jpayne@69: Another drawing suitable as a beginner's
jpayne@69: programming example.
jpayne@69: 
jpayne@69: The small circles are drawn by the circle
jpayne@69: command.
jpayne@69: 
jpayne@69: """
jpayne@69: 
jpayne@69: from turtle import *
jpayne@69: 
jpayne@69: def yin(radius, color1, color2):
jpayne@69:     width(3)
jpayne@69:     color("black", color1)
jpayne@69:     begin_fill()
jpayne@69:     circle(radius/2., 180)
jpayne@69:     circle(radius, 180)
jpayne@69:     left(180)
jpayne@69:     circle(-radius/2., 180)
jpayne@69:     end_fill()
jpayne@69:     left(90)
jpayne@69:     up()
jpayne@69:     forward(radius*0.35)
jpayne@69:     right(90)
jpayne@69:     down()
jpayne@69:     color(color1, color2)
jpayne@69:     begin_fill()
jpayne@69:     circle(radius*0.15)
jpayne@69:     end_fill()
jpayne@69:     left(90)
jpayne@69:     up()
jpayne@69:     backward(radius*0.35)
jpayne@69:     down()
jpayne@69:     left(90)
jpayne@69: 
jpayne@69: def main():
jpayne@69:     reset()
jpayne@69:     yin(200, "black", "white")
jpayne@69:     yin(200, "white", "black")
jpayne@69:     ht()
jpayne@69:     return "Done!"
jpayne@69: 
jpayne@69: if __name__ == '__main__':
jpayne@69:     main()
jpayne@69:     mainloop()