turtle库基础练习(2017.9.8)

1.画一组同切圆

import turtle
turtle.circle(20)
turtle.circle(40)
turtle.circle(60)
turtle.circle(80)
turtle.circle(100)

2.画一组同心圆

import turtle
turtle.circle(20)
turtle.up()
turtle.goto(0,-20)
turtle.down()
turtle.circle(40)
turtle.up()
turtle.goto(0,-40)
turtle.down()
turtle.circle(60)
turtle.up()
turtle.goto(0,-60)
turtle.down()
turtle.circle(80)

3.画一个五角星

import turtle
turtle.forward(100)
turtle.left(145)
turtle.forward(100)
turtle.left(145)
turtle.forward(100)
turtle.left(145)
turtle.forward(100)
turtle.left(145)
turtle.forward(100)

4.画一个黄色实心五角星

import turtle
turtle.color('yellow')
turtle.fillcolor('yellow')
turtle.begin_fill()
for i in range(5):
turtle.forward(100)
turtle.left(145)
turtle.end_fill()