from turtle import *

건 = [True, True, True]
곤 = [False, False, False]
리 = [True, False, True]
감 = [False, True, False]

def draw_trigram(pattern, width):
    """Draws a trigram from the Korean flag. 
    The starting and ending point is the center of the bottom of 
    the trigram, with the turtle facing up.
    The pattern should be a list of True/False values, indicating
    whether each bar should be solid, starting from the top.
    """
    unit = width/12
    for bar_type in pattern:
        draw_trigram_bar(bar_type, width)
        fly(unit * 3)
    fly(unit*-9)

def draw_trigram_bar(is_solid, width):
    """Draws a single bar from a trigram, starting and ending at the center 
    of the bottom of the bar.
    """
    unit = width/12
    right(90)
    fly(unit*-6)
    if is_solid:
        draw_black_rectangle(unit*12, unit*2)
        fly(width/2)
    else:
        draw_black_rectangle(unit*5.5, unit*2)
        fly(unit*6.5)
        draw_black_rectangle(unit*5.5, unit*2)
        fly(unit*-0.5)
    left(90)

def draw_black_rectangle(width, height):
    """Draws a filled black rectangle, starting and ending at the bottom 
    left corner and turning to the left.
    """
    color('black')
    fillcolor('black')
    begin_fill()
    for half in range(2):
        forward(width)
        left(90)
        forward(height)
        left(90)
    end_fill()

def fly(steps):
    "Move without drawing"
    penup()
    forward(steps)
    pendown()