用python的turtle库画一只猫，写出代码

from turtle import * penup() goto(-200, 100) pendown() circle(50) #头penup() goto(-150, 70) pendown() circle(20) #右耳penup() goto(-230, 70) pendown() circle(20) #左耳penup() goto(-200, 0) pendown() goto(-150, 0) goto(-100, 100) #身体penup() goto(-100, 50) pendown() goto(-50, 50) goto(-50, 0) goto(-100, 0