【Python】画图海龟

import turtle
#turtle.width(3)#设置线条粗细
#turtle.pensize(3)#设置线条粗细
turtle.setup(1000, 500, 100,100)#设置画布大小及位置
turtle.penup()#抬起画笔不产生轨迹
turtle.goto(0,0)#仅仅使指针到达目标点指针方向不偏移
turtle.pendown()#放下画笔产生轨迹
turtle.fd(100)#forward
turtle.bk(100)#back
for i in range(3):
    turtle.circle(20,-90)#r,angle r的正负决定了圆心是在左还是在右
    turtle.circle(-20,90)
    
i = 4
while i > 1:
    turtle.seth(120*i)#绝对角度
    turtle.fd(100)#forward
    i -= 1

turtle.fd(100)#forward
turtle.left(120)#left
turtle.fd(100)#forward
turtle.left(120)#left
turtle.fd(100)#forward
turtle.left(60)#left
turtle.fd(100)#forward


turtle.done()#停止画笔