import imagetools
import copy


##### Generating images

def rainbow():
    "your code here"

def formula_art():
    "your code here"

def my_formulaic():
    "your code here"






##### Manipulating images


def width(array):
    "your code here"

def height(array):
    "your code here"

def grayscale(pic):
    "your code here"

def leave_purple(pic):
    "Your code here"

def crop(pic, left, top, right, bottom):
    "your code here"

def enlarge(pic, factor):
    "your code here"

def blur(pic, radius):  
    "your code here"

def my_effect(pic):
    "your code here"

