-- Some colour constants:
constant black = #000000,
--       blue  = #0000FF,
--       green = #00FF00,
--       red   = #FF0000,
         white = #FFFFFF

-- Create new image filled with some colour
function new_image(integer width, integer height, integer fill_colour=black)
    return repeat(repeat(fill_colour,height),width)
end function

-- Usage example:
sequence image = new_image(800,600)

-- Set pixel color:
image[400][300] = white

-- Get pixel color
integer colour = image[400][300] -- Now colour is #FF0000