条件、循环、函数定义练习

1、画五角星

import turtle
turtle.color('yellow')
turtle.bgcolor('red')
turtle.begin_fill()
for i in range(5):
turtle.forward(100)
turtle.right(144)
turtle.end_fill()

2、画同心圆

import turtle
for i in range(5):
turtle.up()
turtle.goto(0,-20*(i+1))
turtle.down()
turtle.circle(20*(i+1))
turtle.write(10-i)

3、画太阳花

from turtle import *
import turtle
color('pink','purple')
begin_fill()
while True:
forward(200)
left(170)
if(abs(pos()))<1:
break
end_fill()
done()

 4、画五个角星

import turtle
turtle.setup(600,400,0,0)
turtle.color("yellow")
turtle.bgcolor('red')
turtle.fillcolor("yellow")

def mygoto(x,y):
turtle.up()
turtle.goto(x,y)
turtle.down()

mygoto(-250,75)

turtle.begin_fill()
for i in range(5):
turtle.forward(100)
turtle.right(144)
turtle.end_fill()

mygoto(-130,150)

turtle.begin_fill()
for i in range(5):
turtle.forward(30)
turtle.right(144)
turtle.end_fill()

mygoto(-70,110)
turtle.begin_fill()
for i in range(5):
turtle.forward(30)
turtle.right(144)
turtle.end_fill()


mygoto(-75,35)
turtle.begin_fill()
for i in range(5):
turtle.forward(30)
turtle.right(144)
turtle.end_fill()

mygoto(-130,-25)
turtle.begin_fill()
for i in range(5):
turtle.forward(30)
turtle.right(144)
turtle.end_fill()