绘制八卦阵

#八卦阵
import turtle
turtle.pensize(5)                  #画笔大小
turtle.penup()
turtle.goto(0,120)
turtle.pendown()

turtle.color("black","black")
turtle.begin_fill()
turtle.circle(-120,180)
turtle.circle(-60,180)
turtle.circle(60,180)
turtle.end_fill()
turtle.circle(120,180)

turtle.penup()
turtle.goto(0,40)
turtle.pendown()
turtle.begin_fill()
turtle.circle(20)
turtle.end_fill()

turtle.color("black","white")
turtle.penup()
turtle.goto(0,-80)
turtle.pendown()
turtle.begin_fill()
turtle.circle(20)
turtle.end_fill()

turtle.hideturtle()                #隐藏画笔

这里我们取大圆的半径为120，中圆自然是它的一半，小圆我们取中圆的三分之一。这样以后，各个点的坐标都出来了

 天灵灵，地灵灵~