# Geek Gurl Diaries Episode 33: Xmas Special Make Snowflakes with Turtle
# By Carrie Anne Philbin
# mod: Matija Lokar, march 2016
# https://www.youtube.com/watch?v=DHmeX7YTHBY

import turtle
import random

def snowflake(turt, size):
    '''create different size snowflakes'''
    # move the pen into starting position
    turt.penup()
    turt.forward(10*size)
    turt.left(45)
    turt.pendown()
    turt.color(random.choice(sfcolor))
    # draw branch 8 times to make a snowflake
    for i in range(8):
        branch(turt, size)   
        turt.left(45)
 
def branch(turt, size):
    '''create one branch of the snowflake'''
    for i in range(3):
        for i in range(3):
            turt.forward(10.0*size/3)
            turt.backward(10.0*size/3)
            turt.right(45)
        turt.left(90)
        turt.backward(10.0*size/3)
        turt.left(45)
    turt.right(90) 
    turt.forward(10.0*size)


# setup the window with a background colour
wn = turtle.Screen()
wn.bgcolor("cyan")

# assign a name to your turtle
elsa = turtle.Turtle()
elsa.speed(0)

# create a list of colours
sfcolor = ["white", "blue", "purple", "grey", "magenta"]

# loop to create 5 different sized snowflakes with different starting co-ordinates
for i in range(5):
    x = random.randint(-200, 200)
    y = random.randint(-200, 200)
    sf_size = random.randint(1, 4)
    elsa.penup()
    elsa.goto(x, y)
    elsa.pendown()
    snowflake(elsa, sf_size)

# leave the window open until you click to close  
elsa.hideturtle()
wn.exitonclick()