turtle库基础练习

1. 画一组同切圆 

    import turtle
    turtle.circle(15)
    turtle.circle(25)
   turtle.circle(35)
   turtle.circle(45)

2. 画一组同心圆

   import turtle
    turtle.circle(10)
    turtle.up()
   turtle.goto(0,-10)
    turtle.down()
    turtle.circle(20)
   turtle.up()
    turtle.goto(0,-20)
    turtle.down()
    turtle.circle(30)

3. 画一个五角星 turtle.forward(50) turtle.right(144) turtle.forward(50)

    turtle.right(144)
   turtle.forward(50)
   turtle.right(144)
   turtle.forward(50)
   turtle.right(144)
    turtle.forward(50)

4. 画一个黄色实心五角星

    turtle.fillcolor('yellow')
    turtle.color('yellow')
   turtle.begin_fill()
    turtle.forward(50)
    turtle.right(144)
    turtle.forward(50)
    turtle.right(144)
    turtle.forward(50)
    turtle.right(144)
    turtle.forward(50)
    turtle.right(144)
    turtle.forward(50)
    turtle.end_fill()