Actually, I prefer the inner part of the loops negative z-indexed (but you can image how it could flip as you move the caret around):<p><pre><code>  for line in file:          for line in file:
  print line                print line
  print &quot;all done!&quot;          print &quot;all done!&quot;
</code></pre>
However, staring at an IDE cross-eyed while trying to program sounds like a punishment one might cook up for devs who bundle Browser Toolbar Adware with screensaver packages that my mum likes to install, and not something I&#x27;d choose for myself.<p>In university, I did some research into Multi-Level Displays (essentially a transparent LCD a few millimetres in front of a standard LCD screen), but what held the tech back for consumer applications was that we hadn&#x27;t yet found a killer app. (In contrast, the gambling industry loved them, and I see them often in Casinos in Vegas).<p>But it seems like it would be a perfect application for fake 3d IDEs.