python海龟画图(6)多边形

 

---

import turtle as t
t.colormode(255)
t.speed(0)
t.bgcolor(0,0,0)
def dbx(n):
    for i in range(1,n+1):
        t.fd(50)
        t.rt(360/n)
for n in range(3,21):
    t.pencolor(255-10*n,0,0)
    dbx(n)
t.exitonclick()