python基础（红旗）

>>> import turtle
>>> def square(start_x,start_y,rec_x,rec_y):
turtle.goto(start_x,start_y)
turtle.color('red')
turtle.fillcolor('red')
turtle.begin_fill()
for i in range(2):
turtle.forward(rec_x)
turtle.left(90)
turtle.forward(rec_y)
turtle.left(90)
turtle.end_fill()

>>> def star(center_x,center_y,radius):
turtle.setpos(center_x,center_y)
pt1=turtle.pos()
turtle.circle(-radius,72)
pt2=turtle.pos()
turtle.circle(-radius,72)
pt3=turtle.pos()
turtle.circle(-radius,72)
pt4=turtle.pos()
turtle.circle(-radius,72)
pt5=turtle.pos()
turtle.color('yellow','yellow')
turtle.begin_fill()
turtle.goto(pt3)
turtle.goto(pt1)
turtle.goto(pt4)
turtle.goto(pt2)
turtle.goto(pt5)
turtle.end_fill()

>>> turtle.speed(1)
>>> turtle.speed(10)
>>> turtle.penup()
>>> star_x=-320
>>> star_y=-260
>>> len_x=660
>>> len_y=440
>>> square(star_x,star_y,len_x,len_y)
>>> pice=660/30
>>> big_center_x=star_x+5*pice
>>> big_center_y=star_y+len_y-pice*5
>>> turtle.goto(big_center_x,big_center_y)
>>> turtle.left(90)
>>> turtle.forward(pice*3)
>>> turtle.right(90)
>>> star(turtle.xcor(),turtle.ycor(),pice*3)
>>> turtle.goto(star_x+10*pice,star_y+len_y-pice*2)
>>> turtle.left(turtle.towards(big_center_x,big_center_y)-turtle.heading())
>>> turtle.forward(pice)
>>> turtle.right(90)
>>> star(turtle.xcor(),turtle.ycor(),pice)
>>> turtle.goto(star_x+12*pice,star_y+len_y-pice*4)
>>> turtle.left(turtle.towards(big_center_x,big_center_y)-turtle.heading())
>>> turtle.forward(pice)
>>> turtle.right(90)
>>> star(turtle.xcor(),turtle.ycor(),pice)
>>> turtle.goto(star_x+12*pice,star_y+len_y-pice*7)
>>> turtle.left(turtle.towards(big_center_x,big_center_y)-turtle.heading())
>>> turtle.right(90)
>>> star(turtle.xcor(),turtle.ycor(),pice)
>>> turtle.goto(star_x+10*pice,star_y+len_y-pice*9)
>>> turtle.left(turtle.towards(big_center_x,big_center_y)-turtle.heading())
>>> turtle.right(90)
>>> star(turtle.xcor(),turtle.ycor(),pice)
>>>