save it as an image o.png, but there's no ".png" anywhere?

As a side note, John File Marker aka EOF is totally amazing!

You could also save 2 bytes by using a*.9 instead of a-a/10

"And the equivalent Brainfk code (**linebreaks for clarity):" -- is that a joke?

My VS2012 gets out of heap space. I guess /Zm would fix it

@flawr It could be removed, nice observation.

@izlin Instead of (i==9?" ":" ") you could use (i^9?" ":" "), which saves a character.