第一次作业

#叠加等边三角形绘制。（教材第二章程序练习题 2.5  ，第56页）
import turtle
turtle.penup()
turtle.pendown()
turtle.pensize(30)
turtle.pencolor("blue")
turtle.fd(300)
turtle.seth(-120)
turtle.fd(300)
turtle.seth(120)
turtle.fd(300)
turtle.seth(60)
turtle.fd(300)
turtle.seth(-60)
turtle.fd(600)
turtle.seth(180)
turtle.fd(600)
turtle.seth(60)
turtle.fd(300)


#正方形螺旋线的绘制。（教材第二章程序练习题 2.8 ，第56-57页）
import turtle
turtle.setup(650,350,200,200)
turtle.up()
turtle.down()
turtle.color("blue")
x = -20
y = -20
z = (20,25,30,35,40,45,50,55,60,65,70,75,80,85,90)
turtle.pensize(5)
for i in range(15):
    turtle.fd(z[i])
    turtle.right(90)
turtle.done()

#python 蟒蛇的绘制  

 

import turtle
turtle.setup(650,350,200,200)
turtle.up()
turtle.down()
turtle.color("blue")
x = -20
y = -20
z = (20,50,80,110,140,170,200,230,260,290,320,350)
turtle.pensize(20)
for i in range(12):
    turtle.circle(z[i],180)
    
turtle.pensize(50)
turtle.fd(50)

turtle.penup()
turtle.goto(-10,-350)
turtle.pendown()
turtle.begin_fill()
turtle.pensize(4)
turtle.fillcolor("white")
turtle.pencolor("white")
turtle.circle(4,360)
turtle.end_fill()

turtle.penup()
turtle.goto(60,-350)
turtle.pendown()
turtle.begin_fill()
turtle.pensize(4)
turtle.fillcolor("white")
turtle.pencolor("white")
turtle.circle(4,360)
turtle.end_fill()