Python、循环的练习

from turtle import *
fillcolor("red")
begin_fill()
for i in range(5):
    up()
    goto(0,-20*i)
    down()
    circle(20*i)
end_fill()

一、同心圆

二、太阳花

from turtle import *
color('red','yellow')
begin_fill()
while True:
    forward(200)
    right(150)
    if abs(pos())<1:
        break
end_fill()
done()

三、五星红旗

from turtle import *
setup(640,440,0,0)
color("yellow")
bgcolor("red")
fillcolor("yellow")
  
def llf_goto(x,y):
    up()
    goto(x,y)
    down()
     
def llf_draw(r):
    begin_fill()
    for i in range(5):         
        forward(r)
        right(144)
    end_fill()


llf_goto(-286,132)
llf_draw(130)

llf_goto(-132,180)
llf_draw(50)
 
llf_goto(-88,132)
llf_draw(50)
 
llf_goto(-88,72)
llf_draw(50)
 
llf_goto(-132,22)
llf_draw(50)

 

 四、画菱形花

import turtle

def draw_1(llf):
    llf.forward(100)
    llf.right(45)
    llf.forward(100)
    llf.right(135)

def draw_2():
    window=turtle.Screen()
    window.bgcolor("blue")
    llf=turtle.Turtle()
    llf.shape("turtle")
    llf.color("orange")
    llf.speed("fastest")

    for i in range(1,37):
        draw_1(llf)
        draw_1(llf)
        llf.left(10)

    llf.right(90)
    llf.forward(155)
    llf.color('green')
    llf.forward(145)
    window.exitonclick()
draw_2()