Could the file main.rb also say what it did after it has finished?

[rubyFeedback]

I run:

ruby main.rb

It yields output such as:

Percent complete: 2.1391% 
lPercent complete: 89.8722%
Done.                  481% 

But I did not see any new files. Could you add code to show what main.rb did
after it has finished? Something like "written to foobar.png" or something.