width = 100
height = 100
pixels = {}

for x = 0, width-1 do
  for y = 0, height-1 do
    pixels[y*width+x+1] = {x/100.0, y/100.0, 0.3}
  end
end

A demo image for TinyBrain's image creation facilities. As you can see, making an image is very simple. Any more help needed? Nah. You're a pro. I knew it! :)

OK, here's some more instructions: http://tinybrain.blog.de/2013/12/26/generating-images-with-tinybrain-17485965/ :)