练习不同颜色画圆
#!/usr/bin/env python
#-*- coding:utf-8 -*-
import turtle
t=turtle.Pen()
my_colors=("red","green","yellow","black")
t.width(4)
t.speed(1)
for i in range(20):
t.penup()#抬笔
t.goto(0,-i*10)
t.pendown()#下笔
t.color(my_colors[i%len(my_colors)])
t.circle(15+i*10)
turtle.done()#程序执行完窗口任然在
输出