'''Use Pillow for image representation'''

# import the Pillow Image type
from PIL import Image

# import url for image input and output
import url

# will create d by d canvases 
d = 300

# scaling factor
s =  50

# generate four colors with equal amounts of red, green, and blue
for i in range( 1, 5 ) :
    amt = i * s
    gray = ( amt, amt, amt )
    im = Image.new( 'RGB', ( d, d ), gray )
    im.show()
    input( 'Enter when ready: ' )