turtle库基础练习

1.画一组同切圆

>>> import turtle
>>> turtle.circle(10)
>>> turtle.circle(20)
>>> turtle.circle(30)
>>> turtle.circle(40)
>>> turtle.circle(50)

2.画一组同心圆

>>> turtle.circle(20)
>>> turtle.up()
>>> turtle.goto(0,-10)
>>> turtle.down()
>>> turtle.circle(30)
>>> turtle.up()
>>> turtle.goto(0,-20)
>>> turtle.down()
>>> turtle.circle(40)

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

import turtle
>>> turtle.color('yellow')
>>> turtle.begin_fill()
>>> turtle.forward(50)
>>> turtle.left(144)
>>> turtle.forward(50)
>>> turtle.left(144)
>>> turtle.forward(50)
>>> turtle.left(144)
>>> turtle.forward(50)
>>> turtle.left(144)
>>> turtle.forward(50)
>>> turtle.end_fill()
>>> turtle.bgcolor('red')
>>>