# Use turtle graphics to make a koch snowflake fractal curve

import turtle # turtle graphics

turtle.speed(100)  # sets speed of turtle to 100


#Code for 0th iteration
# turtle.forward(300) 

#Code for 1st iteration
#turtle.forward(100)
#turtle.left(60)
#turtle.forward(100)
#turtle.right(120)
#turtle.forward(100)
#turtle.left(60)
#turtle.forward(100)

def snowflake(size,iter):
    """"Draw a koch snowflake of given size (in pixels), and iter number of iterations.
    Uses recursive strategy. """
    if iter==0:
        turtle.forward(size)  #0th iter
    else:
        # below looks like above code 1st iteration, but with each forward command
        # replaced with a snowflake of 1/3 the size, and one fewer iterations
        snowflake(size/3.0,iter-1)
        turtle.left(60)
        snowflake(size/3.0,iter-1)
        turtle.right(120)
        snowflake(size/3.0,iter-1)
        turtle.left(60)
        snowflake(size/3.0,iter-1)


snowflake(300,3)  # makes snowflake of size=300 pixels, and 3 iterations

turtle.mainloop()  # stops turtle window from closing


#Command to pull pen up, to stop drawing track
#turtle.penup()

# Command to put pen down, will make track
#turtle.pendown()