import turtle

L=50
N=6
jiaodu=180-360/(N)
tl=turtle.Turtle()
#tl.speed(0)
tl.screen.delay(0)

def f1():
tl.fillcolor("yellow")
tl.begin_fill()
for i in range(3):
tl.fillcolor()
tl.forward(L)
tl.right(120)
tl.end_fill()

for i in range(N):
tl.left(jiaodu)
tl.penup()
tl.forward(L)
tl.pendown()
tl.right(180)
f1()