Pixelation testing with squares

I have been using a graphics programming language to create pixelated photos, just as an experiment to see what I can achieve. This is a part photography, part programming exercise where I am learning to program in a graphics environment. So this is the starting image:

original image websize

Below is a simple square pixelated version with the blocks of 10 pixels in size. The effect is a bit exaggerated for the small versions of the images in this post.

square pixels

And the version below has a grid created using the same programming language. The grid lines look thick as it was created for use with a full-size printable image where they appear a lot thinner:

square pixels with grid

OK but a bit boring…

However, this has been a useful programming exercise.