JN

#!/usr/bin/python

from turtle import *
from math import degrees, radians, sin, cos, atan, sqrt

def main():
    reset()
    #speed(0)

    w = 500.
    h = 200.

    draw_rect(w, h, 0)
    draw_rect(w, h, 15)

    draw_rect(w, h, 90)
    draw_rect(w, h, 105)

    draw_rect(w, h, 180)
    draw_rect(w, h, 360)

def draw_rect(w, h, angle):
    r = sqrt(w*w/4 + h*h/4)

    theta1 = degrees(atan((h/2) / (w/2)))
    theta2 = -theta1
    theta3 = theta1 - 180
    theta4 = 180 - theta1

    theta1 += angle
    theta2 += angle
    theta3 += angle
    theta4 += angle

    x1 = cos(radians(theta1)) * r
    y1 = sin(radians(theta1)) * r
    x2 = cos(radians(theta2)) * r
    y2 = sin(radians(theta2)) * r
    x3 = cos(radians(theta3)) * r
    y3 = sin(radians(theta3)) * r
    x4 = cos(radians(theta4)) * r
    y4 = sin(radians(theta4)) * r

    penup()
    goto(x1, y1)
    pendown()
    goto(x2, y2)
    goto(x3, y3)
    goto(x4, y4)
    goto(x1, y1)
    penup()

if __name__ == "__main__":
    main()
    hideturtle()
    mainloop()