import turtle
turtle.shape('turtle')
turtle.left(180)
x = 200  # The length of the edge star
n = 5  # The number of vertices of the star
y = (n / 2 - 0.5) * 360 / n  # The vertex angle

def star(n, x, y):
    y = (n / 2 - 0.5) * 360 / n
    for i in range(n):
        turtle.forward(x)
        turtle.left(y)

star(11, x, y)