'''Generate a random gradient image'''

# import the Pillow Image type
from PIL import Image

import random

def gradient( ) :
    ''' Return a gradient of dimensions 255 by 510 '''

    w = 510
    h = 255
    dimensions = [ w, h ]

    # create a blank canvas on which to paint our image
    image = Image.new( 'RGB', dimensions )

    r = random.randrange( 0, 256 )
    g = random.randrange( 100, 256 )
    b = random.randrange( 0, 200 )

    # consider every spot (pixel) on the new image
    for x in range( 0, w ) :
        for y in range( 0, h ) :
            # got coordinate of interest
            coord = ( x, y )    # The location in our image (x,y) coordinate in our image

            # The color values for r,g,b
            zr = max( 0, r - x // 2 )
            zg = max( 0, g - x // 2 )
            zb = max( 0, b - x // 2 )

            # generate the color for the pixel
            pixel = ( zr, zg, zb )    # Define the pixel (the color)
            # to be the zr,zg,zg define the altered gradient color!

            # set pixel color at coordinate of interest
            image.putpixel( coord, pixel )  # Put that pixel in each (x,y) spot!
                                            # Just color the spot in with this color.

    return image

if ( __name__ == '__main__' ) :
    image = gradient( )
    image.show()