[Python] Filling a star shape with Turtle

I'm new to Python and I'm learning graphics using turtle. I'm attempting to color a star I've drawn, but the color won't fill for every part of the star.

Here is my code:

def red_star():
f.penup()
f.goto(145,-130)

f.fillcolor("red")
f.begin_fill()

for i in range(5):
f.fd(100)
f.rt(144)

f.end_fill()
f.pendown()

red_star()


Here is what I produce when I run the program:



Continue reading...