#!/usr/bin/python3

import turtle


# The sum of the inner angles of a polygon
# in an euclidian plane:
n = 7
inner_angle_sum = (n - 2) * 180

# Distance between two vertices
l = 70



for i in range(n):
	turtle.forward(l)
	turtle.right(180 - inner_angle_sum / n)

turtle.mainloop()