import sys 
import Image                    # allows us to create image
import ImageDraw                # more fancy stuff

#hidden message stored in message 
message = "secretsarefun"
#color.png can be changed to open a different image to conceal a message
image = Image.open("color.png")



width, height = image.size


#Hiding the message in the image
wpad = width / len(message)
hpad = height / len(message)
x = 0
y = 0
for i in range(0, len(message)):
    red, green, blue = image.getpixel((x,y))
    hiddenChar = ord(message[i])
    
    #STUDENTS START CODING HERE
    
    #placing the hidden message character into the pixel
    
    #STUDENTS STOP CODING HERE
    image.putpixel((x,y), (red, green, blue))
    x += wpad
    y += hpad         

#retrieing the hidden message
hiddenMessage = ""
x = 0
y = 0
for i in range(0,len(message)):
    red, green, blue = image.getpixel((x,y))
    
    #STUDENTS START CODING HERE
    
    #retriving the message from the pixel 

    
    #STUDENTS STOP CODING HERE
    x += wpad
    y += hpad

print hiddenMessage


# output
image.save("colorhidden.png")