jpayne@68: #!/usr/bin/env python3
jpayne@68: """       turtle-example-suite:
jpayne@68: 
jpayne@68:             tdemo_yinyang.py
jpayne@68: 
jpayne@68: Another drawing suitable as a beginner's
jpayne@68: programming example.
jpayne@68: 
jpayne@68: The small circles are drawn by the circle
jpayne@68: command.
jpayne@68: 
jpayne@68: """
jpayne@68: 
jpayne@68: from turtle import *
jpayne@68: 
jpayne@68: def yin(radius, color1, color2):
jpayne@68:     width(3)
jpayne@68:     color("black", color1)
jpayne@68:     begin_fill()
jpayne@68:     circle(radius/2., 180)
jpayne@68:     circle(radius, 180)
jpayne@68:     left(180)
jpayne@68:     circle(-radius/2., 180)
jpayne@68:     end_fill()
jpayne@68:     left(90)
jpayne@68:     up()
jpayne@68:     forward(radius*0.35)
jpayne@68:     right(90)
jpayne@68:     down()
jpayne@68:     color(color1, color2)
jpayne@68:     begin_fill()
jpayne@68:     circle(radius*0.15)
jpayne@68:     end_fill()
jpayne@68:     left(90)
jpayne@68:     up()
jpayne@68:     backward(radius*0.35)
jpayne@68:     down()
jpayne@68:     left(90)
jpayne@68: 
jpayne@68: def main():
jpayne@68:     reset()
jpayne@68:     yin(200, "black", "white")
jpayne@68:     yin(200, "white", "black")
jpayne@68:     ht()
jpayne@68:     return "Done!"
jpayne@68: 
jpayne@68: if __name__ == '__main__':
jpayne@68:     main()
jpayne@68:     mainloop()