视觉盛宴大花圈

from turtle import Turtle,Screen

colors = ['red','blue','red','blue','red','blue','red']

sc = Screen()
sc.title('ZBC')
sc.delay(0)

tom = Turtle()
tom.shape('turtle')
tom.speed(0)

for z in range(120):

    for y in range(3,10):
        c = colors[y-3]
        tom.pencolor(c)
        for x in range(y):
            tom.fd(20)
            tom.right(360/y)

        tom.fd(15+y*5)

    tom.bk(315)
    tom.right(3)