from turtle import *
# edulint: config=cs0

def sum_sequence(n):
    # TODO

sum_sequence(6) # 1 3 6 10 15 21


def compare(n1, n2):
    # TODO

compare(6, 10) # 10 is greater by 4
compare(6, 6) # same


def letterD(height):
    # TODO

letterD(4)
#   ##
#   #.#
#   #.#
#   ##
letterD(7)
#   ##
#   #.#
#   #..#
#   #...#
#   #..#
#   #.#
#   ##
letterD(10)
#   ##
#   #.#
#   #..#
#   #...#
#   #...#
#   #...#
#   #...#
#   #..#
#   #.#
#   ##


def honeycomb(length):
    # TODO

honeycomb(30) # see example in assignment


def snowflake(n, length):
    # TODO

snowflake(2, 50) # see example in assignment
snowflake(3, 30)


def my_snowflake():
    # TODO

# run your own tests