9.12作业

a.五角星

import turtle
turtle.color('yellow')
turtle.bgcolor('red')
turtle.fillcolor('yellow')
def mytogo(x,y):
turtle.up()
turtle.goto(x,y)
turtle.down()
mytogo(-300,100)
turtle.begin_fill()
for i in range(5):
turtle.forward(120)
turtle.right(144)
turtle.end_fill()

b.同心圆

import turtle
for i in range(4):
turtle.up()
turtle.goto(0,-20*(i+1))
turtle.down()
turtle.circle(20*(i+1))

c.太阳花

import turtle
turtle.color('yellow','red')
turtle.begin_fill()
while True:
turtle.forward(200)
turtle.left(175)
if(abs(turtle.pos()))<1:
break
turtle.end_fill()

d.五个五角星

import turtle
turtle.color('yellow')
turtle.bgcolor('red')
turtle.fillcolor('yellow')
def mytogo(x,y):
turtle.up()
turtle.goto(x,y)
turtle.down()
mytogo(-300,100)
turtle.begin_fill()
for i in range(5):
turtle.forward(120)
turtle.right(144)
turtle.end_fill()
mytogo(-200,200)
turtle.begin_fill()
for i in range(5):
turtle.forward(50)
turtle.right(144)
turtle.end_fill()
mytogo(-140,120)
turtle.begin_fill()
for i in range(5):
turtle.forward(50)
turtle.right(144)
turtle.end_fill()
mytogo(-140,40)
turtle.begin_fill()
for i in range(5):
turtle.forward(50)
turtle.right(144)
turtle.end_fill()
mytogo(-200,-40)
turtle.begin_fill()
for i in range(5):
turtle.forward(50)
turtle.right(144)
turtle.end_fill()