python 画同心圆/棋盘

# 同心圆
import turtle
t=turtle.Pen()
colors=("red","blue","yellow","green") # 颜色
t.width(4) # 线的宽度
t.speed(0) # 划线速度
for i in range(9): # 圆的数量t.goto(0, -i*10)t.pendown() # 下笔t.color(colors[i%len(colors)]) # 添加颜色t.circle(15+i*10) # 0 表示起始圆的大小t.penup() # 抬笔
turtle.done() # 使界面一直存在

# 棋盘

import turtle
t=turtle.Pen()
t.speed(0)
for i in range(18):t.goto(0,-i*10)t.pendown()t.goto(170,-i*10)t.penup()
for j in  range(18):t.goto(j*10,0)t.pendown()t.goto(j*10,-170)t.penup()
turtle.done()