You can make a file structure with these blocks!
Ooooohhhhh... I actually like this a lot!! I dunno why I just love nested stuff like this...
Me neither. But this could be useful for a OS.
If someone could find a way to represent this system using sprites it would be pretty useful.
I can try using the write block
Oooh!! This is really cool.
Thanks!
@sqoosh I finished the visualization block.
I made that here OS 0.9 by joan paneque | Snap! Build Your Own Blocks
So basically these are just blocks that make lists?
Your project is the one that gave me this idea! 
Yes, but in an organized and easy to read way.
Can you add a feature to rename files/folders?
Sure.
Nice idea; I love it!
You never actually use the variable i in TREE.
You could simplify the code by making comparisons against ITEM (LIST 1 2) OF, like this:
Given that, I'd be tempted to combine items 1 and 2 into a single header list.
I know. Just updated the project with bug fixes and new blocks.