# This is the solution file for Lab 5, Exercise 2, Problem 8
# The purpose is to create a nested square and a nested circle
# Author: Mengliu Zhao
# Date: July 18, 2017

import turtle as t
import time

def square_up_left(colour, side):
    t.pencolor(colour)
    for each in range(4):
        t.forward(side)
        t.left(90)
    return

def nested_squared():
    square_up_left('black', 200)
    square_up_left('black', 120)
    square_up_left('black', 75)

def nested_circle():
    t.color("black", "green")
    t.begin_fill()
    t.circle(100, steps=1000)
    t.end_fill()
    t.color("black", "red")
    t.begin_fill()
    t.circle(50, steps=500)
    t.end_fill()
    t.color("black", "yellow")
    t.begin_fill()
    t.circle(20, steps=200)
    t.end_fill()

# main
t.setup(width=600, height=800)
t.pensize(3)
nested_circle()
time.sleep(2)
t.resetscreen()
t.reset()
t.setup(width=600, height=800)
t.pensize(3)
nested_squared()
t.exitonclick()