# This is the solution to Lab 5, Exersice 2, Problem 7
# The purpose of the problem is to draw two requiredshapes
# Author: Mengliu Zhao
# Date: July 18, 2017

import turtle as t
import time

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

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

def four_connected_rec(colour, inner_side):
    '''draw four connected rectangles'''
    for ii in range(4):
        square(colour, inner_side)
        t.right(90)

    return

def four_corner_rec(colour, outer_side, inner_side):
    '''draw a large rectangle with four small rectangles at its corners'''
    t.penup()
    t.goto(-outer_side/2, outer_side/2)
    t.pendown()
    square(colour, outer_side)
    increment_step = outer_side-inner_side
    t.right(90)
    for jj in range(2):
        for ii in range(2):
            t.penup()
            t.goto(outer_side/2-inner_side-ii*increment_step, outer_side/2-jj*increment_step)
            t.pendown()
            square_up_left(colour, inner_side)
    t.right(90)
    return

# main:
t.setup(width=600, height=800)
t.pensize(3)
four_connected_rec('red', 200)
time.sleep(2)
t.resetscreen()
t.reset()
t.setup(width=600, height=800)
t.pensize(3)
four_corner_rec('blue', 400, 50)